Mu

He's the Aries Saint. He's very powerful (even if we only see him fight at the end of the manga) and he's the only one who can repair armor, so he's very useful!!!

He appears to be a very tempered guy who fights only when it's necessary. He understood very quickly that the Pope was a traitor that's why he left the sanctuary to live in Tibet. He's a great supporter of Saori, the reincarnation of goddess Athena.

He also has telekynesist abilities!!!

Well, to sum up, he's handsome, clever, usefu, he's perfect!!!!!