Stolas

Stolas Ars Goetia is a demon prince belonging to the Ars Goetia family, a family with an elegant and dark aesthetic... still, Stolas is someone emotionally fragile yet intense.

Stolas is in love with an IMP named Blitzø (the O is silent). but Stolas is married to an Harpy named Stella, an owl who is manipulative and doesn't really care about Stolas, as the marriage they have is only for politics and convenience (heirs more than anything). They both have a teenage daughter named Octavia.

And here is a more complete summary of Stolas:

🦉 Appearance
Helluva Boss
Stolas is an owl-type demon prince (Goetia) from Hell. His design stands out for being:
Very tall and extremely thin
With an anthropomorphic owl appearance
Two pairs of red eyes (one above the other)
Dark blue plumage with lighter tones on the chest
Feet shaped like bird talons
Elegant and luxurious clothing in an aristocratic style (red robes or royal suits with gold details)

He can also sometimes transform into darker or more terrifying forms when emotionally distressed.

🧠 Personality
Stolas is a very emotional and dramatic character, with several layers:
Romantic, intense, and very expressive
Solitary and in need of affection
Somewhat eccentric and theatrical
He has moments of deep sadness and vulnerability
He can also be playful and flirtatious, especially with Blitzo
Although he is of demonic royalty, he does not act cold or distant: he tends to get carried away by his emotions, which makes him complex and human despite being a demon.

📖 Role in the story
He is a Goetia prince from Hell
He has a magical book (grimoire) that allows him to open portals to the human world
He lends it to Blitzo in exchange for a personal deal between them
His relationship with Blitzo is one of the emotional axes of the series
He is also the father of Octavia, with whom he tries to maintain a stable relationship despite conflicts