Sacchin (サッチン) is a friend of Tomoko&#039;s who was originally going to play keyboard for Yabasawa&#039;s band in the Kaimei Rock Festival.<br /> <br /> Manga Debut: Chapter 50 (Sketchbook) <br /> Anime Debut: Episode 16 (Kaimei Rock Festival)<br /> <br /> (Source: SKET Dance Wikia)<br /><br />