Tsubasa Hanekawa appears as Naoetsu Private High School's model student, celebrated for her top grades, kindness, and role as class representative. Her signature phrase, "I don’t know everything, I just know what I know," underscores a humble stance toward her extensive knowledge. This persona conceals deep familial trauma: living with unrelated stepparents after her biological mother's suicide triggered a chain of remarriages, she occupies no personal room, sleeps in hallways, and endures neglect and abuse. This environment compels extreme emotional suppression and performative perfectionism, rationalizing her suffering as normal. Her repressed stress and envy physically manifest through oddities. During Golden Week, she willingly accepts possession by the Sawarineko, birthing "Black Hanekawa"—a violent alter ego with cat-like traits that attacks townspeople. This entity channels her suppressed anger while paradoxically displaying protective instincts toward her. Years later, envy toward functional families materializes as the fire-summoning Hysteria Tiger (Kako), burning homes symbolizing stability she lacks. Both oddities represent self-harm tendencies rooted in internalized trauma. Her relationship with Koyomi Araragi drives key developments. In *Kizumonogatari*, she aids his transition from vampire to human, heals using his vampiric blood (forging a latent link to Shinobu), and develops unrequited love. Witnessing his relationship with Hitagi Senjougahara intensifies her turmoil. During the *Tsubasa Cat* and *Tsubasa Tiger* arcs, Araragi helps defeat her oddities; she later cuts her hair and adopts contact lenses, symbolizing growth. A pivotal *Tsubasa Tiger* moment sees her confront the Hysteria Tiger, accept her envy and pain, and confess to Araragi. Though rejected, this signifies her embrace of imperfection. Post-graduation, she travels globally for humanitarian work, earning the epithet "Japanese Joan of Arc" for refugee aid and demining. This evolves into controversial war mediation; her method—erasing national borders—prompts an international warrant. Her adult life reflects Oshino Meme's nomadic influence and unresolved self-sacrificial tendencies. In *Owarimonogatari*, an evolved personality emerges: she confronts Ougi Oshino with genuine anger over manipulative schemes against Araragi, demonstrating newfound assertiveness. Later appearances show her advising characters like Mayoi Hachikuji and mediating conflicts, such as between vampire twins Highwaist and Lowrise, leveraging her acceptance of both rationality and darker impulses. The *Magia Record* crossover reimagines her as a magical girl whose wish—"I want to forget everything"—erases her memories. Her magic consumes memories as fuel, linking fire-based attacks to emotional burnout, while her Doppel embodies the Sawarineko and Hysteria Tiger, reinforcing thematic ties to self-fragmentation.