William Conner is a pre-made Sim who is living in Moonlight Bay. He lives in the Single Dads household with his daughter River Conner, his roommate and his son. Leonard let William and River live with him to help pay the rent to avoid the loss of the house. Although his bio suggests he and Leonard Ryan are friends, they actually dislike one another. William has three points in Fishing.
William's bio states that his roommate understands his "unique" lifestyle, which could possibly mean he is gay or bisexual.