The definition of a furry is, to quote directly from Google. “an enthusiast for animal characters with human characteristics, in particular a person who dresses up in costume as such a character or uses one as an avatar online.”

William obviously fits the definition as, when alive, he dressed in the spring bonnie suit and enjoyed doing such since he could kill kids easier, he also had the interest in humanlike animals to such a degree he made robots out of the idea.

Henry emily is a bit of a stretch as we don’t know if he’s ever worn a springlock suit, we could imagine he has for testing but we would never know, but he definitely shows the same interest in humanlike animals as william afton.

Welcome to Bottom Gear m8
Today i drive a silent electric car
Hammond uses a damn toilet
And James commits arson