Mr. Yui
Role: Dai's first music teacher
Mr. Yui is best known as the grumpy, classically trained musician who first taught Dai music. He's a composer and teacher, the type who takes the craft seriously—maybe too seriously, depending on who you ask. Fans and viewers often note his curmudgeonly personality, though his genuine expertise and no-nonsense teaching style clearly made an impression on his student.
Content compiled by AnimeList.moe from publicly available sources.
