Unlike the rest of the Aftons, William doesn't have a child to protect, because no one has gone through or will go through the same thing he did. 

Like the others, though, he does have a possession he can use to change from spirit, human, and animatronic forms. 

William is not soft william. That is a disgrace to the fnaf community. 

Also, you'll come in later in the story (after chapter four) but you'll still be in the Side-Movie-Things.