The masked man known as Zechs is an ace mobile suit pilot of the Alliance's elite Specials force, which is in reality a front for the secret society called OZ. Having earned the highest marks in the history of the Specials' Lake Victoria military academy, received the first two-rank promotion in the organization's history, and acquired the nickname "Lightning Baron" for his exploits, he is a hero to the Specials' members and the trusted friend of their leader Treize. But for all his fame, Zechs is shrewd and cautious, wary of taking unnecessary risks or underestimating his enemies. Zechs' mask hides a dark secret. He is actually the son of King Peacecraft, heir to the Cinq Kingdom and Relena's long-lost brother. OZ will eventually give him the opportunity to avenge the death of his father and the destruction of his homeland, but what path will this charismatic warrior take after his long-sought revenge is obtained? In his own way, he's trying to carry on his father's legacy and steer the human race towards a lasting peace.

Note:  Most of Zechs motives are revealed in episode 46.