Lucky

"Lucky" is a former Iron Soldier, a person raised and augmented to be a super-soldier by the Evolved Society. After being rescued by the Crimefighters, he became an ally of theirs, and gained a strong attachment to E.S.M.A.
As part of his bodily modifications to become a super-soldier, Lucky's tongue was cut out, and so he is unable to speak. However he was taught to write, so that he could respond to questions the scientists asked, when they were experimenting.
Lucky was psychologically trained to respond to certain words and phrases, though since being rescued this has lessened somewhat. His name "Lucky" instills obedience in him and makes him follow an order.
Lucky is unnaturally tall and strong, much stronger than even the most physically capable ordinary human. He also recovers from wounds very quickly, and can shrug off severe injuries with ease.
Being mute and muscular, at first Lucky might seem to be quite unintelligent. However Lucky is no less smart than a normal person, and has displayed attentiveness and thoughtfulness.
In terms of personality, Lucky is loyal, and generally very calm and even-tempered. Despite the terrible treatment he received from the Evolved Society, he has no desire to enact revenge against them, and harbours no malice against anyone. He is resentful for what they have taken from him, but knows he can't change what happened.