World of Gachiakuta

Complete Guide to the Gachiakuta Universe (Updated as of June 2026)
Note: Gachiakuta is still ongoing, so some characters do not yet have official ages, heights, birth dates, or stats revealed. In those cases, I will indicate "unknown" to avoid inventing information. The information comes from the manga, anime, and official materials available to date.
1. THE GACHIAKUTA UNIVERSE
The Sphere
Privileged humanity lives in a gigantic floating city called the Sphere, suspended above the lower world.
Characteristics
Extremely classist society.
The rich live in clean and safe areas.
The poor ("tribesfolk") are discriminated against.
Everything considered trash is thrown into the Pit.
Even condemned people are executed by being thrown into the void.
Atmosphere
Clean and orderly architecture.
Brutal contrast between wealth and poverty.
Corrupt judicial system.
Culture based on discarding what is no longer useful.
The Pit
It is the immense hole beneath the Sphere.
Characteristics
Receives centuries of trash.
Receives corpses and criminals.
Connects the Sphere to the lower world.
Atmosphere
Dark.
Hostile.
Polluted.
Full of technological debris and mountains of waste.
The Ground
The true main stage.
Characteristics
Post-apocalyptic world.
Covered by waste accumulated over generations.
Home to monsters born from trash.
Atmosphere
Industrial.
Chaotic.
Toxic.
Constant survival.
Trash Beasts
Monsters created by negative emotions accumulated in discarded objects.
Characteristics
Very varied forms.
Extremely aggressive.
They are the main target of the Cleaners.
Power System
Givers
People capable of awakening the soul of an object.
Jinki (Vital Instrument)
An extremely important object for its user.
When awakened:
Obtains supernatural abilities.
Reflects the owner's personality.
Can evolve.
2. ORGANIZATIONS
The Cleaners
Organization responsible for eliminating Trash Beasts.
Objectives
Protect the Ground.
Investigate the mysteries of the world.
Combat the Raiders.
Team Akuta
Character Card: RUDO SUREBREC
Data
Name: Rudo Surebrec
Age: 15-16 years approx.
Height: officially unknown
Affiliation: Team Akuta
Role: Protagonist
Appearance
Messy black hair.
Large, expressive eyes.
Slim and athletic build.
Dark marks on arms and hands.
Personality
Impulsive.
Justice-seeking.
Stubborn.
Very protective.
Emotional State
Trauma from Regto's death.
Desire for revenge.
Need to find the truth.
Attire
Gray Cleaner uniform.
Characteristic gloves.
Jinki
3R (Watchman Series Gloves)
Ability:
Brings objects to life.
Turns trash into temporary weapons.
Can merge energy from multiple objects.
Character Card: ENJIN
Data
Age: unknown
Affiliation: Team Akuta
Position: Leader
Appearance
Very tall.
Dark hair.
Relaxed smile.
Large hands.
Personality
Charismatic.
Protective.
Intelligent.
Strategic.
Emotional State
High emotional maturity.
Functions as a mentor.
Attire
Cleaner uniform.
Long trench coat.
Jinki
Umbreaker (Umbrella)
Functions:
Attack.
Defense.
Mobility.
Character Card: ZANKA NIJIKU
Data
Affiliation: Team Akuta
Role: Rudo's Instructor
Appearance
Slim.
Two-toned hair.
Arrogant expression.
Personality
Proud.
Competitive.
Loyal.
Emotional State
Seeks recognition.
Strong admiration for Enjin.
Jinki
Staff
Specialist in Vital Instrument handling.
Character Card: RIYO REAPER
Data
Affiliation: Team Akuta
Appearance
Very slim.
Short hair.
Sharp eyes.
Personality
Cheerful.
Teasing.
Cold in combat.
Emotional State
Dark past.
Trust issues.
Attire
Modified uniform.
Lighter design.
Jinki
The Ripper (Scissors)
Used primarily with the feet.
Extremely fast attacks.
Character Card: EISHIA STILZA
Data
Affiliation: Team Akuta
Traits
Calm.
Intelligent.
Great tactical support.
Team Eager
TAMSY CAINES
Appearance
Elegant.
Refined appearance.
Personality
Mysterious.
Manipulative.
Very intelligent.
Abilities
Considered one of the most dangerous Givers.
DELMON GATES
Appearance
Very corpulent.
Great physical strength.
Personality
Friendly.
Trustworthy.
Team Child
BRO SANTA
Characteristics
Protective adult.
Father figure.
DEAR SANTA
Characteristics
Child prodigy.
Very intelligent.
GUITA HEBBY FANTASIA
Characteristics
Eccentric.
Extremely destructive power.
Team Front
SEMIU GRIER
Characteristics
Explorer.
Observer.
Great mobility.
AMO EMPOOL
Characteristics
One of the most important additions.
Great emotional development.
Empathetic.
Leadership
ARKHA CORVUS
Position
Supreme Leader of the Cleaners.
Personality
Mysterious.
Calculating.
Visionary.
Support
GRIS RUBION
Technical support specialist.
FOLLO TUNITO
Logistical support.
TOMME MIMA
Operational assistance.
3. THE RAIDERS (ARASHIYA)
Rival organization.
Objective
Destroy the existing system.
Use Jinki power for chaos.
ZODYL TYPHON
Raider Leader
Appearance
Imposing.
Savage appearance.
Personality
Extremely dangerous.
Charismatic.
Violent.
JABBER WONGER
Appearance
Disturbing smile.
Chaotic energy.
Jinki
Mankira
Poisonous rings.
Devastating neurotoxins.
CTHONI ANDOR
Characteristics
Silent.
Methodical.
NOERDE HEW AMOZO
Characteristics
Intelligent.
Cold.
FU OROSTOR
Characteristics
Monstrous physical strength.
Highly respected.
BUNDUS BEGALKEIT
Characteristics
Capture and control specialist.
4. INHABITANTS OF THE SPHERE
REGTO
Data
Rudo's adoptive father.
Personality
Kind.
Protective.
Wise.
Importance
His death triggers the entire story.
CHIWA
Known member of the Sphere.
Little information revealed so far.
5. OTHER IMPORTANT CHARACTERS
AMO
Constant evolution.
Highly loved by readers.
Important relationship with Rudo.
ALICE (BABA)
Important elder on the Ground.
REMLIN
Recurring secondary character.
WORLD SUMMARY
The Gachiakuta universe is divided into three fundamental levels:
The Sphere → the corrupt paradise of the rich.
The Pit → the dumping ground between worlds.
The Ground → the hell where survivors live.
In this world, feelings deposited in objects generate power through Jinki, while hatred and abandonment create Trash Beasts. The Cleaners fight to protect the Ground and uncover the world's truth, while the Raiders seek to destroy the existing order. Everything revolves around Rudo and the mystery connecting the Sphere, the Watchman Series, the Jinki, and the true origin of humanity.