Shiro Nishi is the grandfather of Seiji and violin maker on his violin shop and owns an Antiec Shop
Shiro is happy grandfather of Seiji Amasawa and heroic. He encourages Seiji to reach his dream to become a Violin Maker and tries to convince Saiji's parents to let Seiji be a Violin Maker. He befriends Shizuku after they meet in his Shop and is a very talented musicanist and is in a band group. He is the first to read Shizuku's Story about the Baron.