Synopsis
Koharu Seto is the young daughter of Hiroko Seto, a cheerful child who adores her mother. She tends to be shy and hesitant around new people at first, but warms up quickly and starts treating them as part of her own family.
Koharu shows her affection in small, quiet ways — drawing a picture of Nagi Aiza playing piano together with Kousei Arima, and calling Kousei her big brother while praising how well he plays.
She is a very small girl with fair skin; unlike the other characters in the series, her eyes are drawn solid black with no visible pupils. Her hair is caramel-blonde and worn in pigtails.
