Ramona Nowitzki

Ramona Nowitzki (Riki Lindhome) is a graduate student who is a huge fan of Sheldon's work. After a lecture, she arranges to have dinner with him in his apartment. The next few days she becomes a permanent presence in his life, pressuring him to concentrate on his research and avoid distractions. Sheldon gets tired of her but is unable to dissolve their "relationship". Eventually, Sheldon reaches a breakthrough in his work, and kicks Ramona out when he refuses to share credit with her for the discovery.