Billy is a cheerful man who is often seen smiling and wandering about happily. He is usually friendly and positive, eager to help people in need and affable with strangers. Billy often teases his friends and makes cheeky jokes, even giving nicknames to those he barely knows. Despite his carefree demeanor, he can be serious and focused when the situation calls for it. He is also deeply caring of his friends, adamant in protecting them even at the cost of his own life.