Ace is one of the protagonists of the anime. He is a hotheaded and is somewhat serious. He is the older brother of Avalon and is also the person chosen to pilot the Seraph, Leviathan.

Age:
13 (Beginning and Middle)
14 (End)

As the story progresses, Ace starts to mature and realizes that every action he makes there is going to be a consequence. After losing many close friends in battle, his rage to destroy the New Axis grows. When he fights, he listens to no one and does whatever it takes to win.

He is supposed to sound deep so he is still a child so his voice goes up and down sometimes.