Chris Sheridan fell in love with Resident Alien when he was asked onboard, and he shared his process and more with us during an interview with TV Fanatic.
Jimmy: What the hell is he doing here? What? Is he your new boyfriend or something? Asta: No! Harry: No. I'm just here eating cake. Jimmy: What? Are you her bodyguard now? Asta: Harry. Harry: I prefer ninja. Asta: Harry, you don't have to do this. [to Jimmy] Just ignore him. Harry: You shouldn't ignore ninjas.