Aki emerges as a secondary figure entangled in a fraught romantic triangle, first presented as Misuzu’s partner before their relationship fractures upon Misuzu’s entanglement with Sayaka. Tensions surface when Aki intrudes on a private moment between the two, exposing unresolved conflicts. Her isolation deepens when, left alone outside the research center, a surge of jealousy drives her to a solitary act of self-gratification, abruptly halted by a hostile female android. The confrontation turns violent, leaving Aki battered and emotionally shattered.

Discovered unconscious and suspended from a tree, Aki is urgently transported by Misuzu for medical aid—a journey derailed by a collision engineered by the vengeful android. This attack severs Aki from the core group, confining her to hospitalization while others confront the android.

Her arc remains tethered to relational strife and victimization, with no elaboration on her history, internal drives, or evolution beyond catalyzing central conflicts. The narrative confines her agency to reactions within the romantic and physical trials imposed by the android’s pursuit.