Responses
Probably to protect herself. Yknow, from being beaten or r*ped since she was hated and it’s a thing that a lot of knights would do to a female prisoner
You're right that was probably the reason. ヾ(❀╹◡╹)ﾉ~
My theory is that he never planned to abandone her in the shadow room, that's why he told her "endure it". Maybe he wanted to rescue her later in? Or he told the crown prince to go get her and that's why he came to see her?
As to why he gave her a knife i don't know.