Chidori Hitotsuya is a university senior and close friend of protagonist Atsushi Ikuta. She has brown eyes and brown hair typically worn in a ponytail with a fringe, alongside a 76-52-80 cm physique. Her demeanor is friendly and approachable.

When her academic schedule becomes overloaded, she catalyzes the story’s main events by connecting Atsushi with tutoring opportunities for students Arisa Kumagai and Maya. Though aware of Atsushi’s longstanding romantic feelings, she initially maintains distance due to her existing committed relationship.

As the narrative unfolds, complications arise in her romance, coinciding with her developing conflicted emotions toward Atsushi. This tension sparks internal struggle over potential romantic choices involving him. Her character arc focuses on navigating this unresolved personal crossroads.

Originating from a visual novel, her portrayal remains consistent in its OVA adaptation. Expanded media references like AI chat profiles do not contribute canonical development beyond her established narrative role and interpersonal dynamics.