RIki LIndhome (Ramona Nowitzki)
Ramona Nowitzki first appeared on TBBT when she runs into Sheldon during lunch at the Caltech cafeteria. She plans to pack a dinner and take it to Sheldon’s apartment, and Sheldon couldn’t be more delighted since, hey, free food! The other group members, however, see Ramona as a crazy stalker.
At first, things appear to go fine with the two, despite everyone else’s concerns. But things turn a hard left turn when Ramona asks Sheldon to credit her on his theorem. This rubs Sheldon the wrong way, and he asks her to get up and leave. Apparently, she was stalking him in a sense.