| Madam Simza Heron |
|Family||René Heron, brother|
|Behind the scenes|
|Appearances||Sherlock Holmes: A Game of Shadows|
|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.