Asriel Dreemurr is the biological child of Toriel and Asgore and the adoptive brother of the first human.He serves as the final boss of the True Pacifist Route and a major character in Undertale.Like his parents,he's a Boss Monster with white fur,long ears,a snout and a set of visible fangs.After Alphys resurrects him without a SOUL as Flowey,he becomes incapable of feeling love.This makes him grow bored and resentful.After temporarily regaining his compassion,he apologizes for his actions