An inmate in Wentworth. Liz is put up to the task to retrieve evidence finding out clue's to try and make Liz look good with Vera, but Sonia declines any information coming forth.
While cutting Maxine's hair, she delivers a cryptic message that she may have had something to do with the murder (referring to cutting hair as taking a crown away).
Initially friendly towards the crew, things get rocky between them after Sonia discovers that "Witness X" is an inmate which causes her to speculate Maxine.
- Sigrid Thornton appeared on Prisoner under the name Ros Coulson
|Wentworth: Season 4|
|"Love and Hate"|
|"Divide and Conquer"|
|"The Eleventh Hour"|