| Sienna Shaw | |
|---|---|
| Terrifier character | |
 Lauren LaVera as Sienna in Terrifier 2 | |
| First appearance | Terrifier 2 (2022) |
| Created by | Damien Leone |
| Portrayed by | Lauren LaVera |
| In-universe information | |
| Full name | Sienna Shaw |
| Relatives |
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Sienna Shaw is a fictional character and the main protagonist of the Terrifier franchise. Sienna first appears in Terrifier 2 (2022) as a teenager interested in cosplay who battles the enigmatic villain Art the Clown. She is portrayed by Lauren LaVera, who will reprise the role in further installments. Sienna's creator, Damien Leone, invested a lot of time into fully developing her as a character as he regretted leaving the first film's heroine Victoria Heyes underdeveloped. The character originates from an abandoned film Leone was developing in the late 2000s, featuring the concept of a Valkyrie-angel warrior attired heroine battling Art.
LaVera was the only person Leone considered for the role. LaVera spent months questioning Leone for preparation and developed a full binder of notes about Sienna—asking him who inspired the character and having him create a playlist that he believed Sienna would listen to. Leone states that LaVera is the first actor to show immense care and interest for a character he wrote, helping him further develop her. Leone describes Sienna as his favorite character that he has ever created.
The character's Halloween costume drew a significantly favorable reaction from fans—LaVera, however, was not fond of the attire as it was uncomfortable for her to wear. The outfit was not complete by the time filming began, and it did not have lining; LaVera had to wear duct tape to hold the attire together throughout the shoot and even developed blisters. Sienna was well-received by critics and audiences, with much of the acclaim going toward her characterization and LaVera's portrayal. Sienna has been referred to as LaVera's breakthrough role and a contemporary example of the "final girl" trope.