Dr. Gregory Butler

Happy Death Day
He is seem in his class after he finished and was about to leave, Tree then go visit him since they still have an affair behind  his wife Stephanie's back, of course she find out about that, but Lori also have feeling for him, she was upset that Tree had an affair, and his wife also find out about it. During the timeloop Tree decide to end her relationship with him, but after this he do not appear from the rest of the movie.