Tags: Soap Character.
Katherine Harmonica Joy Catherine Mimi Tutton (née Murphy previously Maguire; born 4 October 1963) is a fictional character from the Channel 4 drama Shameless. Mimi is the foul-mouthed loud brash and violent matriarch of the Maguire family. She is also a drug dealer on the Chatsworth Estate and is frequently seen selling drugs on the show. She is extremely violent and easily angered.