The first impression Zelos gives is that of a skirt-chasing, irresponsible, and immature man. However, he has more internal conflicts and emotional pain. As he reveals to Lloyd Irving in Flanoir, his mother, Mylene Wilder, was told to marry his father, the Chosen at the time, by the "Oracle" of Cruxis, even though she loved someone else. Growing up in Meltokio, his home life was less-than-comforting. Neither his mother nor his father cared much for him; his father was already in a relationship with another woman, and his mother would only rarely pay any real maternal attention to him. As such, his main caretaker was Sebastian, the family butler. It is highly likely most of his narcissist-like behavior stems from the fact that he was neglected and unappreciated throughout his childhood.