There is a scene very early on (manga only, removed in the anime) where a woman is gagged and has her hands tied, and two men are shown ripping her clothes off and talking about how theyre going to rape her. The act is not actually shown. Another example later on is, a slave owner sticks his hand down a male slave's pants, the slave then has an extremely shocked reaction
in the manga- the character Cordelia describes that as a child she was convinced she was a girl, but grew up to be the spitting image of her father with a tall/muscular build and was no longer able to pass as female
Canute is often mistaken for a girl while he's a teenager. In the manga, Cordelia uses her male given name as she's unable to pass as a woman, and is uncomfortable with it