Simza Heron
Guy Ritchie adaptations
Vital statistics
Sex Female
Nationality Romani
Family René Heron (brother)
Occupation Fortune teller
Behind the scenes
Appearances Sherlock Holmes: A Game of Shadows
Portrayed by Noomi Rapace

Madame Simza Heron, also known as Sim, is a Romani gypsy who assists Holmes and Watson in their fight against Professor Moriarty's plans for Europe.

She first meets Holmes in a London club where she is working as a fortune teller in the same club that Holmes and Watson are attending Watson's bachelor party. Holmes visits her and deduces that there is an assassin hiding in the ceiling waiting to kill her and fights him whilst Sim attempts to escape.