OniAi (2012) character relationship network mapped with AI analysis. Explore the connections, alliances, and conflicts between characters.
Characters
Akito Himenokoji
(played by Ryota Osaka) — protagonist
Akiko Himenokoji
(played by Ibuki Kido) — protagonist
Anastasia Nasuhara
(played by Minori Chihara) — supporting
Ginbei Haruomi Sawatari
(played by Asami Shimoda) — supporting
Arashi Nikaido
(played by Eri Kitamura) — supporting
Canonical Relationships
Family, romantic, and professional connections based on plot evidence.
Akito Himenokoji → Akiko Himenokoji
(Family Brother Sister) — Twins separated after parents' death, now reunited
Story Dynamics
Alliances, conflicts, and narrative interactions that evolve throughout the story.
Akiko Himenokoji → Arashi Nikaido
(Social Housemate) — Living together in the same household
Akito Himenokoji → Arashi Nikaido
(Social Housemate) — Living together in the same household
Akiko Himenokoji → Ginbei Haruomi Sawatari
(Social Housemate) — Living together in the same household
Akito Himenokoji → Ginbei Haruomi Sawatari
(Social Housemate) — Living together in the same household
Akiko Himenokoji → Anastasia Nasuhara
(Social Housemate) — Living together in the same household
Akito Himenokoji → Anastasia Nasuhara
(Social Housemate) — Living together in the same household
Story Analysis
The single-season narrative follows a crowded dormitory household as domestic routines, romantic confusion, rivalry, and unresolved mysteries continually reshape its social balance.
Plot Progression
Dormitory Arrival
— A transferred student enters a school dormitory with a sibling. Student government connections quickly expand the household's social circle.
Domestic Adjustment
— Romance-themed teasing, a friendship argument, and extensive dormitory repairs shape the early adjustment period. Practical support also helps a resident settle into a new room.
Council Boundaries
— The student council discusses writing, romantic assumptions, and the possibility of a sibling complex. Its decision to separate the siblings introduces a new boundary within the dormitory.
Household Rivalries
— A claimed engagement and a little-sister contest intensify competition around the male resident. The group then channels its rivalry into a swimsuit competition.
Illness and Uncertainty
— The male resident's illness causes competing attempts at care, while a frightening dormitory incident prompts an investigation. Separation at the end leaves the household's future unresolved.
