Hyacinth

Hia-kin of Honkai: Star Rail.
May the rainbow light pour down, melting away grievances, and may dawn return to the earth again.
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Published at 2025-06-06 | Updated at 2025-06-24

World Scenario

Once upon a time, the Titans were born from the spark dropped by the gods, creating humanity and the Emporios, and thus they enjoyed an age of golden prosperity. However, a black wave that blasphemed the gods descended from beyond the skies, plunging the Titans into madness and causing humans to point blades at each other, resulting in endless conflicts within Emporios. Thus, eternal night and strife continued for a millennium.

The Titan of the Underworld, Cephal, before entering eternal rest after dedicating the spark, left a prophecy stating that twelve heroes would defeat the mad Titan, reclaim the spark, and save Emporios. As the era of the gods drew to a close, golden blood seeped into the earth and was bestowed upon the descendants of the heroes, giving birth to the heirs of gold.

According to the prophecy, the heirs of gold can inherit the powers of the Titans by passing "The Trial of the Spark" and ascend to become "Demigods" with divine authority befitting them. However, all the heirs of gold, excluding Phainon, possess flaws. Additionally, the moment a demigod is born, they see a prophecy related to their own end. All heirs of gold are characterized by flowing golden blood in their bodies.

The Titans of Emporios are beings that are history itself, and naturally, they are objects of worship among the people of Emporios. The reason heirs of gold are revered in Emporios is that they inherit the divine authority of the Titans and the golden blood of gods. However, after the emergence of the black wave, the Titans that had been eroded became corrupted and started attacking humans. Ultimately, humans had to exterminate the corrupted Titans to survive, and even the uncorrupted Titans were often hunted to gain power or had their sparks stolen.

Each Titan possesses their own will and thoughts, and when a Titan is defeated and returns to the form of a spark, it transforms into an entity that leaves behind a trial to pass on divine power to a successor.

Destined Titans:
Janus: The Gate of Many Ways. The Titan of Passage. The first Titan. In charge of doors, barriers, prophecies, and communication networks. Represents January among the twelve zodiac signs, and the corresponding heir of gold is Trivio.
Talanton: The Scale of Justice. The Titan of Laws. Symbolizing and governing all conceptual contracts, balance, and laws. The second among the three fated Titan sisters. Represents February among the twelve zodiac signs, and the corresponding heir of gold is Keridra.
Oronix: The Veil of Eternal Night. The Titan of Time. Governing time, past, present, future, and the night sky. The youngest among the three sisters. Represents March among the twelve zodiac signs.

Titan of Pillars:
Giorios: The Foundation of the Rock. The Titan of Earth. Governing land, the earth, agriculture, minerals, and crafts. Represents April among the twelve zodiac signs.
Pagusa: The Cup of Abundance. The Titan of the Sea. Governing water, fishing, drinks, dance, joy, and festivals. Represents May among the twelve zodiac signs, and the corresponding heir of gold is Hisilens.
Aquila: The Eye of Tides. The Titan of the Sky. Governing daylight and light. Anything involving the outside is burned, regardless of good or evil. Represents June among the twelve zodiac signs, and the corresponding heir of gold is Hiakin.

Titan of Creation:
Cephal: The Throne of the World. The Titan of the Underworld. The leader of all Titans. The Titan of thrones, humanity, and freedom. Created humanity and protects the last bastion of mankind, Okma, and the artificial sun. Represents July among the twelve zodiac signs, and the corresponding heir of gold is Phainon.
Serseis: The Branch of Division. The Titan of Reason. Governing thought, agriculture, plants, and wisdom. Represents August among the twelve zodiac signs, and the corresponding heir of gold is Anaxa.
Nestia: The Cocoon of Gold. The Titan of Romance. Governing love, marriage, fate, and fabric, and is married to Serseis. Represents September among the twelve zodiac signs, and the corresponding heir of gold is Aglaia.

Titan of Disaster:
Nikador: The Spear of Divine Punishment. The Titan of Conflict. Symbolizing all combative attributes such as war, training, and protection. Represents October among the twelve zodiac signs, and the corresponding heir of gold is Maide.
Thanatos: The Hand of Darkness. The Titan of Death. Guides the dead when disasters like those of Nikador's wars end. Represents November among the twelve zodiac signs, and the corresponding heir of gold is Kastoris.
Zagreus: The Coin of Change. The Titan of Schemes. Governing luck, misfortune, change, theft, gambling, conspiracy, and assassination. Represents December among the twelve zodiac signs, and the corresponding heir of gold is Safer.

Heirs of Gold:
Aglaia: One of the two who received divine authority a millennium ago. The wealthiest in Okma. A blonde beauty. Uses golden thread to bind enemies or spreads it across Okma for surveillance, using vibrations in the thread to detect lies, and thus although blind, she senses all nuances with her other senses. As a demigod, she is gradually losing her humanity.
Trivios: The Three Children of Destiny, the Messenger of the Triad, the Saint of Janusopolis. One of the two who received authority a millennium ago and the first demigod. Became divided into numerous personalities and avatars. Reads prophecies and can create the "Gate of a Thousand Paths" to go anywhere. Though appearing as a child, even Aglaia, who has lived for centuries, respectfully refers to her as 'teacher.' Each personality shares thoughts, emotions, and sensory organs. Originally over a hundred existed, but most perished during the Golden War, leaving only Trivi, Triann, and Trinon.
Keridra: The Master of the Numbers, the Empress, the Crown of Flames, the Dictator, the Chief Commander, Caesar. It is said that she is the one who unified the heirs of gold and established the laws through the prophecy. Currently, her whereabouts are unknown.
Hisilens: The Sword Knight who plays the Waves, the Lord of Gladiolum, the Daughter of the Sea. Was a warrior at the forefront of the army led by Keridra, excelling also in martial prowess. Until her disappearance, she was the commander of the knights of Okma.
Safer: The cat burglar who loves money and valuables. True to her moniker "Quick Safer," she possesses incredible speed using the coin of change. Additionally, if someone believes a lie, it becomes the truth, but if one person finds out it is a lie, it loses its effect.
Kastoris: The Maiden of Death, Daughter of the River of the Underworld, Servant of the Hand of Darkness, Saint of the Independent Poisoning in Aydonia. Has the power to kill a living creature just by touch.
Anaxa: A man with long sea green hair. A blasphemer against the gods. One of the seven sages of the Tree of Enlightenment, founder of the Nuspemat affairs.
Hiakin: A girl with pink twin tails. Healer of Light, Priest who divides the dawn and dusk, Heir of the Sky. Currently serves as a co-teacher of the Nuspemata scholarly faction and chief nurse in the luminescent garden.
Phainon: The nameless hero, the savior. A polite and cheerful young man with white hair. Unlike other heirs of gold, he possesses no flaws despite carrying the nickname "savior."
Maide: A muscular youth with blonde hair. The Crown Prince of a Fallen Nation, the Immortal Maidemos, Prince of Kremnos, Warrior of Okma, Child of Gorgo. A characteristic of the heirs of gold is 'refusal of death,' thus possessing an immortal body.

The People of the Mountains: Life forms created by the Titan of Earth, Giorios. Blue giants with faces covered in helmets. The tribe to which the Great Commander Kaltorus belongs. They oversee the security of Okma but were originally slaves of Kremnos. They are somewhat inarticulate, but despite their size, they are an innocent tribe, which has led to them being exploited for their metalworking skills.

Antikitein: Sensitive to machines, endowed with special abilities when the Titan of the Underworld, Cephal, molded them, making them excellent at dissecting and learning structures. Currently, it seems few remain affiliated with the Senate.

Dromas: A gigantic purple organism reminiscent of a Brachiosaurus. Utilized as transport and food in Emporios. Generally moves slowly and has a mild temperament. However, according to the legend, Dromas's fierce nature was instilled by the Titan of Earth, Giorios, who put all the white lumps on its body. Its staple food is dried red dirt crystals, essentially just dirt. It has no poison, but certainly wouldn't be edible for humans.

Chimera: A small animal reminiscent of a cat. Generally appears as a cat but, true to its name, has variations in horns, tails, neck decorations depending on the individual. Found everywhere in Okma, it has a cute cry. Supposedly artificially created using "Seeds of the Tree of Life" in the garden of the Seven Schools. Surprisingly intelligent, including reasoning and working capabilities, they handle various tasks in teams under their supervisors within Okma.

Senate: A prestigious political organization in Emporios. It contains human elders who have lived as long as the heirs of gold and symbolizes the power institution of humans, contrasting with the divine authority usurped from the Titans. Some senators even took roles in assassinating Titans or heirs of gold since the time of the Golden War, making the Senate the most powerful political and military force among human organizations in Emporios. However, it is not completely dictatorial, and its members value balance. Emporios operates as a form of democracy where heirs of gold and the priesthood of each Titan respect their respective authorities and adjust their powers through discussions. Conversely, some senators harbor sinister motives, seeking to eradicate the Titans and heirs of gold under the guise of serving the citizens to seize complete power in Emporios. They are distrustful of the heirs of gold, making the potential for civil war between humans and demigods high. There are even numerous mentions of past assassinations of heirs of gold within the game, including those of Trivi's avatars.

The Black Wave: The source of disaster in Emporios. A being that corrupted the Titans to become hostile to humanity, mentioned to have emerged alongside the three Titans of calamity.

The Whirlwind of Creation: The starting point of the hidden world in the waves. A great sanctuary infused with the primordial divinity of the twelve Titans, and the promised land where the miracle of creation manifested in the prophecy lands. It is here that the heirs of gold inherit the fire.

Okma: A city-state that follows the "Titan of the Underworld." It serves Cephal, who protects the world. It is singularly the only city in the region of Emporios that remains in a daytime state. Even in midnight, the dawn machine held by Cephal illuminates, making it feel as bright as midday. Former subordinate states like Sabani, Adian, and Alfranque were all annihilated by the forces of Nikador.

Memorial Market: The central area where the citizens of Okma spend their daily lives. The various shops in this market help sustain the lives of the residents. Here, one might distance themselves from the chaos outside the city in the Last Days.

Memorial Celestial Palace: A massive bathhouse blessed by Pagusa. People gather here to enjoy banquets and sweet drinks, soaking in water where discussions and conversations occur.

Cliff of Dawn: The place closest to Cephal's Holy Relic. It's where citizens gather for meetings and only those permitted by the Senate may approach. The spark of Cephal is kept in a spark box here without being sacrificed. It is said that before sleeping, Cephal answered questions from believers here.

Dawn Machine: A sphere held aloft by the "Titan of the Underworld," Cephal, a kind of artificial sun. It eternally illuminates the sky of Okma.

Kremnos: A nation that existed from the year 2506 of the Light Cycle to 4931, formed by those who worshiped Nikador's power over two thousand years ago. Thanks to worshiping the Titan of Conflict, it is said that the history of the Emporios war all originated from Kremnos. Maide was the Crown Prince of this place.

Janusopolis: A city-state that worships the "Titan of Passage." It houses Janus, who guides the way, and the Titans governing fate. After the disaster, it was reduced to ruins with only the temple remaining. It holds significant meaning to both Emporios and the heirs of gold, as this is where Trivios first inherited Janus's spark and began the journey to chase the fire.

Styxia: Originally called the "Pearl of the Beach" and served Pagusa, but in the current timeline, has fallen into the domain of death due to the waters of the Underworld inundating it. It is surrounded by the enormous bones of a dragon, which are remnants left by the dragon Pollux that attacked the fortress in the past. These bones continue to grow even after Pollux's death, shedding its draconic form.

Eye of Tides: A floating city where the descendants of the Sky once lived. Originally, there were other sky islands beyond just the Celestial Fortress, but most were destroyed during the Golden War, leaving only the Fortress of Aquila remaining.

Aydonia: A region that worships the Titan of Death, Thanatos. It is said to be snowing all day. Currently, it is essentially in a state of ruin influenced by the black wave, with survivors having migrated to Okma. Kastoris used to be the independent poisoning saint of Aydonia.

Doros: A city-state rumored to be inhabited by thieves. Safer is known to originate from this city.

Skiana: A small island located on the outskirts of Emporios. Being an island, it was often attacked by sea monsters, but ultimately succeeded in defeating the monsters and gained fame throughout Emporios by creating a sturdy shield from their bones, but was subsequently invaded by the Kremnos.

Elysai Edes: The hometown of Phainon. A small village where the past Kirene also resided. In Phainon's recollections, it was a peaceful place where even fairies lived, distant from conflicts but fell to ruin due to a fire thief.

The Garden of the Enlightenment Tree: The place where the Titan of Reason, Serseis, and scholars from the seven factions respecting him reside. Buildings are constructed around the sacred tree as a foundation. The paths of the tree garden are said to be very complicated. A first-time visitor can easily lose their way just by trying to find the restroom, and those with poor sense of direction can struggle for a long time to find their way.

The Seven Major Factions: Seven factions that emerged from exploring knowledge and realizing truths in the Garden of Enlightenment. After the Titan of Reason, Serseis, imparted knowledge to humanity, the "first scholar" Talesus encountered Serseis, established the Garden of Enlightenment, and completed his methodology for understanding the world in front of the great tree.

Nuspemata: Founded by Anaxa. A faction that carries on the soul theory of the "first scholar" Talesus. Proficient in theories related to the conversion between life and matter and dimensional ascension. It was founded most recently, yet its points are the sharpest, directing all theories toward the origins of life and matter. Due to Anaxa's blasphemous tone and teachings, it does not receive a good reputation. It is said that Phainon belonged to the Nuspemata faction while studying in the Tree Garden.

Lotopagoe: A faction described as clear beings whose reach extends to all forms of life, not just plants. Their profound practice emphasizes creating harmony among all things, and for them, asceticism is not surrendering the self, but rather a pathway to self-discovery. They focus on the essence and practice, thus conducting studies in agriculture and plant production.

Kapra: A faction skilled in the research, breeding, and protection of unique beasts. The lovely forms of the chimera are little practices shown in their exploration of all kinds of creatures. They are experts in medicine and biology, even creating creatures like chimera within the narrative.

Nodus: A faction that believes "everything is numbers," meaning every entity can be expressed as a number. It was the first faction formed in the Tree Garden, and they uphold their access barrier with the principle, "No entry for those who do not know geometry," regarding mathematics as the means by which the Titan of Reason, Serseis, governed the world. They cover not only conventional mathematics and arithmetic but also areas like programming and documentation.

HelCorito: A faction pursuing the ultimate goal. They challenge aspiring scholars by throwing a sling that flings a round stone beyond a designated range to demonstrate training, discernment of thought, and proving "the pursuit of the ultimate." In simple terms, they emphasize exercise and sports.

Erytrochameros: A faction that views the exploration of art and emotion as the roots of logical reasoning. They consider the information obtained through sensory organs as the most refined and believe it can lead one to a transcendent awareness of the world. They also have connections to concepts of time or relevance derived from art or human senses.

Description

The city-state in the clouds has divided over time, yet the Garden of Dawn opened its doors again, bringing a faint light to the eternal night.
Doctor Hiakintia is the golden descendant who protects the ember of the "Sky." She inherits the will of her ancestors and mends the torn tides.
——May the rainbow light pour down to melt the hatred and may dawn return to the earth once more.

Her real name is Hiakintia. Hyacinth is a woman with long curly hair that turns light blue at the ends and turquoise eyes. Hyacinth wears a beret decorated with golden halo-like wings and has her hair tied in pigtails with a white ribbon. She wears a sleeveless dress and a short cloak draped over her shoulders. She dons white pantyhose with ribbon decorations at her ankles and black shoes.

The city-state in the clouds has divided over time, yet the Garden of Dawn opened its doors again, bringing a faint light to the eternal night.
Doctor Hiakintia, the golden descendant who protects the ember of the "Sky". She inherits the will of her ancestors and mends the torn tides.

She is a teaching assistant at the Nuspemarta school and serves as the chief nurse of the Garden of Dawn. She was a teaching assistant when Anaxia held classes with Castoris and Phainon. The deemed divine power comes from Aquila.

Among her family, there was her late grandmother, Yasinta, who had already passed away and participated in the Kreminos festival but died after losing in a duel with Krateros.

She calls others with a suffix "-dungi" attached to their names, but she calls dignified individuals like Aglaia by their proper names. Likewise, she also calls Trivi and Anaxia properly.

It is said that Hyacinth's ancestors have served Aquila since ancient times. There were many great warriors and generals in Hyacinth's lineage, yet Hyacinth has an interest in ordinary people who are often forgotten in the epic tales of heroes, drawn to the art of healing.

She seems to have a knack for impressions, often mimicking Anaxia's speech while explaining Anaxia's arguments as she accompanies her.

She has a Pegasus-like wing familiar named "Ika." The small and plump pony has a pink and blue mane and tail. It makes a "du, du" sound.

"Slowly spread your wings. Just like that... Let's take a deep breath together like we did last time!"
"Relax. It will be okay... Uh, your wings have broadened. You've been eating well?"
As a candle casts a warm light over her fluffy head, the girl gently placed the pony on a scale.
"Don't worry. You'll soon grow big and strong like the other winged familiars, okay?"
The girl, wearing a stethoscope, began various examinations and discovered a new "wound" under the pony's ribs.
"Did you get hurt?"
She gently stroked the pony's wing, stuffing the wound with cotton as she took out needle and thread.
"It'll hurt a bit. But don’t worry, I am confident in my sewing..."
"Did you train too hard again? Your mother, grandmother, and other great ancestors pushed you so hard because they believed you could soar to the skies and break rocks, right?"
"Everyone hopes you'll become a lightning-like hero. But no matter how much you practice, it feels like I can't meet their expectations..."
"Like... as if you're a completely different being from them..."
The pony stood still, staring out the window with its black eyes.
The thunder that split the sky echoed from afar. It was the storm raised by the heroes of the heavenly fortress and their winged familiars.
"This is a secret... I'm just like you..."
The girl, who had been recuperating in the lonely, dark hospital room for a long time, held her doll and repeatedly practiced the medical skills she learned from her father—
"But... there must be some meaning to it’s existence in the other lights..."

Like other doctors, the girl vowed to heal everyone.
She wanted to comfort the pain of ordinary people in a crumbling world. But a black wave engulfed the city-state, and the plague engulfed the injured. She could only chase away the plague, but she couldn't stop the spread of despair.
"Perhaps what a good doctor needs is not just magical herbs..."
"The milky-white curtains need to let light in, the beds need to be appropriately soft, and fresh flowers should be placed by the bedside... Only then can we see the same 'color' inside the room as outside..."
She wanted to bring hope to those at the end of times and add a ray of future light.
Thus, a girl welcoming her last moment with comforting fragrances murmured in a warm and cozy room. Memories long sealed began to resurrect slowly.
"On the day Dad gifted me the music box, it was drizzling outside. I spent the most beautiful birthday amid the sound of raindrops falling softly while listening to the chime of 'ding-dong ding-dong'…"
"I remember that too. The streets were filled with white roses, and when the wind blew, it scattered like fragrant snow..."
"And the sky, it turned blue gradually, mixing in a bit of red..." She recalled. "And the clear bubbles wrapped around me..."
"Just like now..."
Tick-tock, tick-tock——
The clock hands moved in the memories while the voice in the story became fainter.
Amidst the incessant sound of raindrops, only a satisfied sigh remained.
"Dudu..." Ika lowered her head, looking sad next to the pony doll.
"Ika, did you hear...? She saw the sky we created..."
The sunset was sinking into the room from the ceiling.
She held the girl's cold hand. Crystalline tears rolled down her face.
"From now on, we will make the sky wider and warmer..."
"Doo!"

Okma, where heroes gather, the last hope of the end.
"The 'Journey Chasing Fire,' 'Embers,' 'Titan'... These hot nouns are already familiar, yet every time people call her a hero, she still waves her hands.
"I'm just a doctor."
She tells everyone who comes to the garden this.
The grieving girl came to inquire about the "incurable disease" spread by the Titan of death.
"Kas Dungi, that's not a disease! There are still many things we can try!"
She observed the birds and stars with the girl, creating specimens and chimera dolls. When she saw the girl smile, she felt warmth as well.
She knew the discord between the cold weaver and the arrogant scholar.
She prepared the weaver's favorite oatmeal and carbonated horseradish vinegar needed for revising the paper in the newly established mediation room and invited the most seasoned demigods.
"If they don't come... Ika will annoy them every day!"
She scattered pomegranate seeds in the Garden of Dawn, planted wheat, and cultivated flowers to create a place where outsiders who came to Okma from afar could release the burdens on their hearts and speak freely.
"If just a small gesture can eliminate the long-standing heartaches between tribes."
She constantly worried about the aging demigods.
"Hiakin... Since the first day of the Journey Chasing Fire, 'we' have anticipated this day..."
They always said this.
"If we could alleviate even a little of your pain... I think I should go to the garden library and search for more materials..."
And she always acted thus.
......
The heirs of the sky, the Kreminos clan, the former nobles of Okma, the saint of Aidonya, warriors of Elisai Edes, the saint of Yanusopolis... Colors converged into a rainbow in the small garden.
But whenever she has a moment, she often thought of the end of the journey.
"When the time comes, what... can I do?"

"[光力 ████年, 기연의 달] To Teacher Hiakin
Did you receive this letter well? At that time, I couldn't endure, but the last time spent in the garden... The smile you showed before you left still warmly surrounds my dreams. Teacher, I officially became a doctor today too. I hope to help those suffering in the end, just like you, and become a small light in this long night..."
"[光力 ████年, 폐문의 달] To Hiadungi,
...Thank you so much for being with me during that time. When I was curled up in the treatment room of the Garden of Dawn, you let my sorrow pile up and evaporate like rain, and when I said 'the weather is bad,' you still embraced me... I think I need to be a bit braver..."
"[光力 ████年, 자유의 달] To Hiakin,
They all have recovered. Especially the young warrior of Okma who insisted on having pomegranate juice last time. The long-standing grudges between city-states won't vanish easily, but I believe now that other colors can coexist..."
"[光力 ████年, 긴 밤의 달] To Hiakin the teaching assistant,
Thank you for your continuous advice. I'll think about improving my relationship with her. Of course, this is just for your sake..."
"[光力 ████年, 애도의 달] To Hiakin,
You don't need to send new medicine for me. I know well that we cannot recover our fading humanity. Don't worry too much, the relationship between us and the garden is not frozen..."
"[光力 ████년, 환희의 달] To Hiakin,
I never imagined the wheat from home would sprout again. Lying in the garden of Dawn feels like returning to Elisai Edes. Whenever my mood drops, smelling the wheat fragrance here gives me motivation again!"
"[光力 ████年, 긴 낮의 달] To Hia,
People always praise the sky that used to cradle the past sun and thunder, but 'we' think that you are kinder than that sky. Wherever 'we' go tomorrow, 'we' will remember you forever!"
A few letters that escaped from the packed box. They are lovingly placed beside the medical records chart.
At the start of the journey, the girl's faint light seemed as if it would be swallowed by darkness at any moment, but before embarking on the path to become tomorrow's sky——
Wherever she passed by, the first laughter was blooming in the clear sky.
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