Waver is often called a "spoiled brat" who is the very embodiment of a "narcissist that does not doubt he's a genius." He displays traits of cowardice, being short-tempered, and constant complaints without action. He has an inferiority-complex about his abilities as a Magus and Master, and he constantly doubts himself at every turn. He forms a bond with Rider over time that begins to change him, with Rider bolstering his confidence and recognizing his traits.