Ex-Knight that was almost killed by his own king who fear his power.
Quiet, clam, sad(deep down) and only sometimes find things that make him happy
He carries a sword that has the ability to relay information back to his mind giving knowledge of everything that goes on around him and it can generate the power of lighting.
His arm contains the soul of a demon it came from and can ooze poison and acid from it or tip its claws with either.
thanks to the soul of a mighty dragon he can take it form when need be
Arthur was once the greatest knight in his kingdom and was also the most loyal. Well after his last mission which he did on his own the king fear he might grow to powerful for him to control and orderd him killed. he barley escaped but not without losing his arm. Well once he left he met a wizard smith would by chance stumble upon an metal demons arm he offer to craft it to him in exchange that he go took the package to a friend of his Arthur agreed. but not til he had finished his errand that he found that the spirit of the demon rested within the arm luckily Arthur had one of the strongest minds around and could handled the demon rho he often would talk aloud to it. Many years later he found his sword it was one made to make its user able see all that was happening around him at once which again he managed to handle it. by this time Arthur mind we burden my what seemed like two other minds inside his but he still handle the demonic thoughts from his arm and the information of the sword pretty well but then it happened one more time he sound found himself on a mission to slay a dragon to help free a village of which the dragon forced to wait on it every whim well with his demonic powers of poison and acid from the arm and lighting from the blade he was able to win and not thinking anything of it accept the offer of letting the dragon meld its soul to his thus giving him its form when he needed it but he didn't know that this would also but the dragons mind in with his which he know had THREE minds along with his all working at once to most they would have gone mad but Arthur once again took control to the point you can't even tell tho he might sometimes be seen talking to one of them which looks like he is talking to himself to those who do not know him.