Madam Simza Heron
Vital statistics
Sex	Female
Nationality	Romani gypsy
Occupation	Fortune teller
Family	René Heron, brother
Appearances	Sherlock Holmes: A Game of Shadows
Portrayed by	Noomi Rapace

Madam Simza Heron, also known as Sim, is a central character in the movie Sherlock Holmes: A Game of Shadows. She is portrayed by Noomi Rapace.

Sim is not a character who appears in the Sir Arthur Conan Doyle books, but appears in the film as a Romani gypsy. Sim joins Sherlock and Watson on their journey when she finds people are after her because they think her brother, René, told her something he shouldn't have.