Loyal, caring, knowledgeable, child-like, eccentric, firm attitude towards his responsibilities as a friend, could show great fear when faced with danger. Saw it as his duty to make sure the Doctor was ok after the death of River. use to be a professional conman. He was often easily deceived. Happily played with children's toys and refers to the toilet as "the little boy's room". Criminal past. Gentle humor, especially when trying to diffuse tense situations. Alien with cybernetic implants.