Dr. Sara Bellum is the head of S.H.U.S.H.'s research division and somehow both profoundly intelligent and spectacularly stupid at the same time. Her goal is to win the Nobel Prize with the inventions she creates for S.H.U.S.H. Ms. Bellum has a very calm and understanding personality, which makes her a very good role model and good source of advice for the Powerpuff Girls. While she remains calm at most times, she still tends to panic when a situation escalates and she especially shows anger towards the Mayor when he acts idiotic.