Nozomi, a transfer student recently returned from Berlin, is first seen tearing up textbooks on the school roof, witnessed by Nagara. This act reveals her defiance against perceived constraints. Her personality centers on unwavering resolve and independence. She consistently refuses to compromise her principles, even under pressure, rejecting the student council's smartphone and rules as an imposition of authority without consent. Punitive consequences fail to sway her steadfastness. Her optimism counters passivity or despair, notably in interactions with Nagara, though revelations about her original timeline—where she died by suicide—introduce moments of vulnerability within her persistent hopefulness.

Her ability, termed "compass," allows her to perceive a distant light invisible to others, representing a directional guide to other dimensions or desired destinations. This navigational tool functions consistently across unstable environments. She identified this light early while adrift in the void; her attempt to reach it by jumping was interrupted by Nagara, sparking debate about immediate return. Her power evolves beyond perception, symbolizing hope and truth as a fixed point amid distortions.

She catalyzes movement, challenging stagnation. Initiating exploration beyond the void by identifying the light, she leads the class to the island dimension. Later, she separates from Nagara to pursue divergent paths, mutually promising to reconnect if memories persist—a reunion that never occurs. Her compass aids Nagara and Mizuho during their escape, guiding them despite her absence. Her death occurs offscreen in the drift world, framed as instantaneous. In the original world, a version of her remains alive without shared experiences.

Her bond with Nagara begins when she engages him on the roof; they remain allied much of the story. Their dynamic highlights mutual growth: she pushes him toward action, while his reserve grounds her impulsivity. Their separation underscores thematic divergence—her pursuit of the compass light versus his self-discovery. Post-return, their original-world counterparts do not rekindle this connection. Her ideological clashes with authority, like the student council, reinforce her rejection of coercive structures, operating on principles of autonomy.

Symbolically, her name means "hope," aligning with her ability to identify direction in chaos. The compass light transcends physical laws, embodying non-linear solutions to existential disorientation. It persists as a metaphorical guide after her death, emphasizing her impact on Nagara and Mizuho's escape. Her arc intertwines with finding meaning; her compass leads not to a predefined "real world" but toward possibilities reflecting inner desires.