Куб

A demon and a loyal steward to both Yucie and her father, Gunbard, Cube is able to summon magical items through sorcery, with which he helps Yucie out in several occasions. He is one of Yucie's best friends. During the story, we learn that Cube was formerly Glenda's steward, but has been banished from the Demon World by her mother. (source : wikipedia)