Kotone Shiomi is a pale skinned japanese girl with striking red eyes and long lashes. Kotone has has auburn hair, which she always has in a high ponytail, along with silver barrettes which form the Roman numeral XXII (22). She is never seen without her red mp3 and earphones.

Kotone is very bubbly, funny, upbeat and cheerful. She is outspoken, blunt and literal when responding and getting her points across. She is also the Tomboyish leader of S.E.E.S.