Miyo Inbami, a scion of the Hundred Devouring Families, leverages her clan’s pharmaceutical mastery—extending to poisons—within Hyakkaou Private Academy’s cutthroat hierarchy. Her bid to usurp Kirari Momobami’s presidency masks a calculated agenda rooted in familial legacy. Separated from her biological sister, Miri Yobami, due to heir shortages, Miyo forged a covert sign language with Miri to bypass restrictions on verbal communication during clan gatherings, cementing their alliance through silent collaboration. Her striking appearance features long black hair (dark blue in the anime) swept into a bun, a loose strand framing her face, accentuated by crimson eyeshadow and glossy lips. Clad in the academy’s standard uniform and brown heels, she mirrors Miri’s visage but diverges in hairstyle, embodying both elegance and subtle menace. Beneath a veneer of refinement lies a strategist who wields poison and psychological warfare as tools of control. She dismisses gambling’s unpredictability, preferring rigged outcomes through marked cards, collusion, and calculated risks—even ingesting toxins to manipulate adversaries. Her loyalty to Miri intertwines with self-interest; she coerced her sister’s sacrifice during the Nim Type Zero game yet relied on Miri’s antidote after nearly fatal theatrics against Mary Saotome. Defeat by Mary exposed cracks in Miyo’s arrogance, prompting reluctant admiration for her rival’s tenacity. This hinted at latent humility, though her ambitions persisted through subsequent schemes, including the Hundred Votes Auction and backing Terano Totobami’s maneuvers. Her name, Miyo (三欲), merges “three” and “desire,” echoing her relentless drive, while Inbami (陰喰) signifies “shadow bite,” reflecting her clan’s subterranean tactics. Alternative kanji readings (美代) hint at “beautiful generation,” contrasting her ruthless persona. The Miyo-Miri dynamic oscillates between symbiotic trust and manipulation, their bond fortified by shared strategy yet strained by power imbalances. Nonverbal cues streamline their schemes, yet Miyo’s willingness to exploit Miri underscores a pragmatism overshadowing sisterly ties. Across conflicts, Miyo embodies contradiction: a poison-wielding tactician clinging to legacy, a manipulator confronting vulnerability, and a rival grudgingly acknowledging strength beyond her own. Her trajectory hints at evolution beneath a mercenary exterior, though ambition remains her compass.