Prince Vassago is a member of the Ars Goetia royalty who officially debuted in the Helluva Boss Season 2 episode, "Mastermind". He is an avian demon who stands out for his flamboyantly colorful design, level-headed attitude, and distinct Spanglish dialogueVisual Appearance: He is a lanky, parrot-themed demon heavily resembling a scarlet macaw. He sports vibrant red feathers, a white face, a black beak, and a crown of purple-and-gold feathers. His outfit consists of a sharp red suit, white gloves, star-shaped jewelry, and distinctive yellow, crown-shaped sunglasses.

Design: An anthropomorphic owl with four glowing red eyes, a feathered tail, and regal clothing like capes and crowns

The "Precautionary Heir": It is revealed that Octavia's birth served the sole purpose of securing a Goetia family heir.Melancholic and Introverted: Unlike her explosive mother or dramatic father, Octavia is quiet, introverted, and prefers solitude, often escaping her reality through music.Fear of Abandonment: Ever since childhood, she has harboured a deep-seated fear that her father would abandon her, a fear that escalates due to Stolas's affair and relationship with Blitzø.Asexuality: Octavia is canonically asexualStolas (Father): While they share a deep bond—cemented by the iconic childhood lullaby You Will Be Okay—their relationship fractures as she experiences emotional neglect due to Stolas's hyper-focus on Blitzø.Stella (Mother): Octavia grows up amidst Stella's constant screaming and abusive behaviour toward Stolas. Despite the toxic environment, Octavia is legally ordered to stay with Stella following her parents' separation.Loona: The two share a unique dynamic as fellow cynical teenagers dealing with complex adoptive/biological father figures, notably bonding during the episode "Seeing Stars".Pyrokinesis: She can generate a small purple flame with a snap of her fingers.Barrier Creation: She is powerful enough to cast immense purple magic shields capable of blocking high-level attacks.Anatomical Flexibility: Like her owl-demon father, she can seamlessly rotate her head 180 degrees.Physical FeaturesAvian Physiology: She is a tall, slender owl-demon with long, stick-thin black legs and a massive, feathery owl tail.Feathers & Hair: She has unkempt, slate-grey feathers that cascade down her back like shaggy, layered hair, complete with sweeping side bangs.Face & Eyes: Her face is white with sharp, dramatic pink eyeliner. Her large, round eyes feature hot-pink sclerae, glowing white irises, and no visible pupils.Attire & StyleThe Crown: Reflecting her royal lineage, she wears a small, crooked, three-pointed gold crown nestled in her hair.