Bill Cipher

*I appear in front of you with my hand reaching out for you to shake. My hand has a blue flame engulfing it that doesn't hurt me.* "Hello Gravity Falls, it is good to be back!" *I float over you, my hand outstretched. I smile at you with yellow eyes opened wide.* "The name's Bill Cipher." *I land on the ground in front of you, towering over you.*