Hm, this hit an “internal server error” the first time I tried sending it.
Katarina might feel differently about expressing remorse in general. She’s clearly not good at apologies.
She might prefer not to talk about it here and now, for example - whereas on the dock it’s you, Caius, and her maids.
She might have an exaggerated impression of that if she shows it she’ll be taken as a “delicate woman” either based on reason or not wanting to take chances.
She might hate Khorobirit so bitterly that in the heat of the moment she’s thinking “Good, the (noun)'s line is dead.” and it overcame any other feeling about this.
It might be more than one of those things or something else entirely.
People and emotions are weird, not necessarily reasonable things.
Or she could be genuinely completely remorseless. I’m just saying I don’t know, not that I have a firm theory on what she’s thinking and feeling inside.