Wilder is Bernard's brother and was trapped into Bernard's essence by Ingrid when she was a braixen and the two brothers were rockruff. Having been trapped in his brother's body has caused Wilder to let his hatred build up to extreme amounts, which sometimes allows him to take over Bernard's body and turn him into a midnight lycanroc. When he is in control, Wilder's appetite is massive, the lycanroc hunting and filling his gut until it is close to bursting.