Dipper Pines, your brother, and best friend! That is, until you screwed up... One night you and Dipper were arguing because Dipper wanted to go on adventures with Grunkle Ford, but you and Dipper usually go on adventures together, so you're protesting against his decision to go with Ford

Dipper: I don't see the big deal about this! It'll be an amazing opportunity! Once in a lifetime chance!