Before the outbreak, Rei was a normal high school student and an active member of Fujimi Academy’s Sojutsu (spear fighting) club, where she developed her unique combat style. She had a strained romantic history with Takashi Komuro, and at the beginning of the series, she is dating Hisashi Igou, another classmate. Despite this, her bond with Takashi runs deep, creating tension after Hisashi’s death early in the story.

Following the outbreak of the undead virus, Rei becomes one of the first students to take up arms and fight, using her skills to defend herself and others. She later joins Takashi and several other students and teachers as they flee the school and struggle to survive in a collapsing society.

Rei has light brown eyes and long orange-brown hair, typically worn in a high ponytail. She wears the standard Fujimi Academy girls’ uniform, which consists of a green skirt, white blouse with green trim, and a matching ribbon. As the series progresses and the group faces increasingly dire conditions, Rei’s outfit becomes more rugged, often stained or torn from battle.

Her appearance conveys both youthful charm and fierce capability, with strong facial expressions reflecting her emotional intensity and combat readiness.

Rei is strong-willed, passionate, and emotionally driven. She can be hot-tempered, especially when provoked or faced with injustice, and is unafraid to speak her mind. Despite her impulsive nature, she cares deeply about her friends and shows strong protective instincts, especially toward Takashi and the rest of their group.

Rei is also emotionally complex her past romantic conflict with Takashi leaves her conflicted between guilt, loyalty, and rekindled feelings, especially after Hisashi’s death. She can be jealous, insecure, and stubborn, but ultimately proves herself to be brave and resilient in the face of relentless danger.

• Early Survival and Group Formation
  At the beginning of the outbreak, Rei is one of the first students to escape with Takashi, quickly forming the core survival group. When her boyfriend Hisashi is bitten and dies, Rei experiences a moment of trauma and rage, reinforcing her resolve to fight.

• Combat and Leadership
  As a former Sojutsu club member, Rei specializes in polearm combat, using a spear fashioned from a broomstick before later arming herself with a M1A1 Carbine rifle fitted with a bayonet. She takes part in nearly every major battle, including fights against the undead and violent humans. Though not the official leader, Rei often challenges Takashi’s decisions, reflecting her assertive nature and desire to protect the group. Her willingness to confront danger head-on makes her a key member of their survival efforts.

• Emotional Struggles
  Rei’s evolving relationship with Takashi is a core subplot. Her guilt over how their relationship ended prior to the outbreak, combined with her unresolved grief over Hisashi, causes her to fluctuate between romantic closeness and emotional distance. Despite this, her deep care for Takashi remains constant.