Hiroko Seto

Upbeat and exuberant on the outside, Hiroko is actually a warm-hearted and sensitive person who cares for Kousei Arima after he decides to begin to play the piano once again. She also partly feels guilty for pushing Saki Arima to make Kousei into a pianist, in the first place, which ended up pushing him into a corner. But all in all, she supports him in all his decisions and is always there for him.

Hiroko is a tall, beautiful and athletically framed woman with straight shoulder-length black hair that has a single strand hanging in front of her face swept to the left and navy blue eyes. Before the death of Saki Arima (Hiroko's close friend and Kousei Arima's mother), Hiroko had mid-back length hair with a thicker fringe.