Belle Fontiere is a modern recurring-turned-minor character in the SMG4 series. Belle makes her first appearance in the episode S̶M̶G̶4̶: I Can't Believe It's Not SMG4! who acts as a doppelganger counterpart to Tari. She is a cyborg gamer and aspiring stage actress, and a former member of the Anti-Cast, thus SMG3's former ally. Belle is one of the seven former secondary antagonists of the YouTube Arc. In the fourth quarter of the tenth season, Belle became allied with SMG4's Gang.