Lili

Name: Lili
Name (in Kanji): りり
Birthday: N/A
Height: N/A
Blood Type: N/A
Seiyuu/Voice Actor: Kaori Mizuhashi
First Anime Appearance: Episode 1
First Manga Appearance: Volume 1, Chapter 1

A fairy that helped a man build the school. Can only be seen by a few people. He gave Hino a "magic violin" that'll let anyone play it if they want to play it bad enough.

He likes to say "No Da" after every sentence