Iyona Kawai, an elegant and kindhearted daughter from a wealthy family, occupies a central narrative role. She attends the same elementary school class as protagonist Honmaru Edojo, who harbors strong feelings for her. Her appearance blends mature features with height typical of her peers, complemented by modest attire. Academically and athletically gifted, she achieves top grades and displays considerable athletic prowess. Her personality embodies purity, care, and honesty.

Iyona shares a close friendship with Rui Ijigawa, though their dynamic contrasts with Iyona's compassionate nature. She exhibits a nurturing attitude toward Taruruto, affectionately calling him "Taru-chan" and viewing him as a surrogate younger sibling. This protectiveness manifests physically when she restrains him during emotionally charged confrontations.

She treats Honmaru with consistent kindness despite his status as a social outcast and frequent bullying target. While her feelings toward him remain complex and not fully overt, indications suggest potential underlying affection, diverging from Rui’s aggressive approach. Iyona observes Honmaru’s personal growth, noting his gradual development of inner strength and resilience through challenges like confrontations with bully Nezo Zakenja. Her perceptiveness allows her to recognize Honmaru’s genuine qualities beyond his reliance on Taruruto’s magic.

During pivotal events—such as the martial arts tournament where Taruruto’s magical abilities become public—Iyona demonstrates adaptability and acceptance of extraordinary circumstances. She consistently provides emotional stability within the group, mediating tensions and offering support during conflicts involving Honmaru, Taruruto, and classmates like Jabao Jaba or Tsutomu Harako.