Kyōko Izanami, Yōta Narukami's childhood friend, carries a name meaning "apricot child," with her surname Izanami blending "that one," "seat/position," and "average/common." She has long dark blue hair, pink eyes, and wears pink hair clips. Peers considered her beautiful during middle school, a view Yōta shared.

Originally mischievous, spirited, and happy in childhood, her mother's death ten years prior profoundly altered her. She became meek, mild, and introverted, withdrawing socially but maintaining her connection to Yōta. Despite this shift, her core innocent kindness remained. Academically gifted and skilled at piano, her calm beauty made her highly popular among boys, though she consistently rejected Yōta's romantic advances with minimal reaction, reflecting her emotional reserve. She enjoys watching baseball.

A pivotal change occurred when Yōta and Hina Sato intervened in her family's unresolved grief. Kyōko had urged her reclusive father to visit her mother's grave, frustrated by his avoidance. Yōta and Hina facilitated the discovery of prerecorded video messages from Kyōko's late mother, containing birthday wishes and a symbolic "happiness spell." Confronting this sorrow with her father allowed Kyōko to process her grief. This healing experience restored some of her childhood vitality, making her more expressive and emotionally open. Following this, she visited Yōta to express gratitude, displaying warmer feelings toward him. However, recognizing his growing attachment to Hina, she gracefully stepped back without pursuing a romantic relationship.