Feliles
A demon dog sorta thing. It will rip you to pieces if you ever encounter it. In the anime, "Zero no Tsukaima", Season 3 episode 2, Shefield threatened Louise that if she didn't give away the location of the other void user, her Feliles would kill her. (They travel in packs)
Shefield: If you don't want to get ripped apart by my Feliles, tell me where the other void user is!
Louise: I don't know what you are talking about!
Shefield: Suit yourself.
Louise: AAAAHHHH!
Louise: I don't know what you are talking about!
Shefield: Suit yourself.
Louise: AAAAHHHH!