In Terrifier 2, Sienna and Jonathan are working through the grief of losing their father in a fiery car wreck that occurred after his brain tumor diagnosis. Sienna's friend Brooke explained that their father had become violent and abusive in the months leading up to his self-inflicted accident.

Sienna Shaw is a fictional character in the Terrifier franchise. Sienna first appears in Terrifier 2 (2024) as a teenager interested in cosplay who battles the enigmatic villain Art the Clown.