Jacob Hopkins as Miller "the Killer", a bully who targets Rafe, but later joins his plan to battle Dwight.[4] Alexa Nisenson as Georgia Khatchadorian, Rafe's smart younger sister.[3] Isabela Merced as Jeanne Galletta, the intelligent president of the AV club, who helps Rafe with his plan.[3] Efren Ramirez as Gus, the disgruntled janitor who later joins Rafe's plan to get revenge on Dwight.[3] Isabella Amara as Heidi James A. Patterson as James, a restaurant manager at an Italian restaurant where Bear proposes to Jules on her birthday. Gemma Forbes as Dana, a waitress at Dave and Buster's. Jessi Goei as Bella, a phone addictive girl who joins Rafe's plan to get revenge on Dwight.