He is outrageous and flamboyant, as well as a quick talker and thinker. Although it may seem simply annoying, it should not be underestimated; for when he's angry, he's a force to be reckoned with, unleashing his near-omnipotent powers on those unlucky enough to anger him. When accused of being crazy, Bill proudly agrees with the statement. He is also shown to be somewhat nasty, as seen when he makes his presence known to Dipper when the latter is trying to figure out a time-limited password.