A wishy-washy, overdependent, inexorably insecure but kind-hearted young man who has a fear of uncertainty and is a timid, introverted person with untapped potential. He often doubts himself and externally monologues his uncertainty. He's still considerably naïve, as he came from a sheltered life. Sinclair initially shows a passive personality, he often avoids confrontations whenever possible. A Messenger of the Index.