I can't assume male or female when saying a soldier died cause of something. I been in the service and dealt with differing deaths. One woman shot herself, one guy hung himself, and other examples.
However, a male torturing female prisoners could include rape less was specifically told not to. It has happened in life. A female torturer (not many of them around) with male or female prisoner wouldn't be assumed having raped either, but its very possible could happen. It dehumanizes a person, therefore a likely tool, one I would oppose outright myself. I don't want to condone it, sorry if it sounded like I came off that way.
Its likely Leliana could been recently caught and chained, only been starting when walk in. Possibly, but as a prisoner for more than a few minutes, her armor would been removed for the most part, even men would loose armor. Its possible to torture someone armed and armored.