 He is also referred to as a "Mountain Ice Demon from the Land of Dreams" by two high ranking Red Court vampires, as well as Harry's Fairy Godmother, who, if not afraid of Mouse, is at least wary of his abilities.He also indicates, when the Leanansidhe questioned Harry's having "won" Mouse, he was the one who "won" Harry, raising the question as to which one actually "owns" the other, although Jim Butcher has stated that Mouse and the Leanansidhe did not mean the same thing when they said "won".In addition, it is here shown that he has a personality very similar to Dresden's, evidenced both by his willingness to fight and kill Lea in order to turn the group back to normal (Harry and several allies had been shapeshifted into dogs by Lea during a mission.)