Ah. So I'm thinking of a character. His name is Mystery.
Mystery Man is a man with multiple personalities.
The Child: A sweet heart of a man who has just turned eighteen. He's innocent, kind and compassionate, but lacks experience and is maybe even kind of naive. He seems simple minded sometimes but he can be extremely wise and insightful. The Child is a master of stealth, and hiding as well. As The Child, Mystery Man is very quick witted, fast on his feet and perceptive of his surroundings.
The Monster: A terrible serial killer. He has murdered one thousand people, or at least he has claimed to. He claims to have lived since before the Norman Conquest of England. He has seen much evil as a mortal and a spirit, and he has claimed it is this which has given him insight into the meaning of life.
The Wild Man: This is an old man who claims to have been a wizard in Medieval England. He was hunted down by well meaning people, knights, mobs and nobility after being framed for the torment and murder of children, animals, royalty and even entire villages. He asked for his dear friend Lord Garth to kill him so he would be spared torture and being burned alive. The Wild Man won't reveal his name and he seems to know much more about The Mystery Man than his other personalities. He isn't telling Mystery Man, The Monster or the Child about the secrets he knows.