Grim

Grim is a magic-wielding monster who serves as the Yuu's partner. He has a big mouth, and easily gets carried away.

Appearance
Grim very closely resembles a cat. His fur is grey with a white patch at his chest and pink paw pads, and he has electric blue flames blazing from his ears. His eyes are also bright blue. Around his neck, he wears a black-and-white striped bow tie which is torn at the ends; it also bears a light purple gemstone that rests against his breast. His tail is shaped like a pitchfork.

Trivia

 * His name may be a reference to Grimm's Fairy Tales, a popular fairytales collection which includes the tale of Snow White, Sleeping Beauty, and so many more.
 * Grim can use fire magic