Rindō transfers from the Aoi Clan into the Akane Class, becoming Team Dog's fourth member. Having grown up surrounded by males, she adopts the masculine pronoun "boku." Upon arrival, she initially presents as male, concealing her identity behind a kitsune mask gifted by her former clan chief.

She is a short, slim girl with black hair cut to shoulder length. Her eyes remain unseen in most depictions due to her constant mask-wearing; the mask serves as a coping mechanism for her shyness and social anxiety.

Introverted yet resilient, Rindō dislikes busy moments and prefers quiet environments but perseveres in challenges. Despite failing to catch fish during a mission, she continued assisting her team, demonstrating dedication to collective goals. She forms a significant bond with Tsubaki, her first friend in the Akane Class, which proves instrumental in her personal growth.

Rindō specializes in Summoning Jutsu, enabling her to teleport others to her location, though the technique demands substantial energy, limiting its frequent use.

Her development centers on gradual social integration and self-acceptance. Persistent teasing from Hinagiku about her mask leads Rindō to incrementally reveal her face to others. This process occurs earlier in the anime than in the manga, depicting her growing confidence. Her journey illustrates adaptation to a new social environment while maintaining her core traits of quiet determination and loyalty to teammates.