Yeah she doesn't seem too worried about being the only one in the room with much larger presumably dangerous inmates. She's probably a third degree blackbelt or boxes golden gloves, and you would never know it just from looking at her.
This is the scene at the very end where Dawn is shown in hand cuffs between two large inmates, She's the police officer standing guard. She's much more stern looking and a bit intimidating. Although I still find her so cute.