Daarin bias disclosed the idea that Karin would take care of Daan and make sure he doesn't commit suicide by Pocketcat post game is. I'd say lol but honestly also very much reads to me as, at best ooc by shipper brain (fine and harmless thing we can all be guilty of) but at worst misogynistically misreadings of her character motivated from culturally ingrained notion that "women should be caregivers and take care of others because that is their biological role."

Karin cares a lot about other people that is an extremely important quality to her but she so clearly fucking sucks the worst out of everyone at extending interpersonal care. As bad or worse than O'saa is at it and he's literally not trying on purpose because the life he led made him believe "emotions make you weak therefore you need to stop complaining and abandon them." Levi the literal picturesque idea of a victim of war that she claims her lifes work purpose is to uplift the voice of, when he's having his ptsd trigger by the Rher trenches Karin does not try to comfort or reassure him she takes the opportunity to soapbox about the bremen again, your personal discretion whether that's a better or worse response than "..."

Karin would not check in on Daan's mental health and make sure he is taking his anti depressants she'd get him committed to a 1940s psychiatric hospital where he'd be put through period appropriate electroshock therapy that she knows about but does not see the cruelty and injustice in because it's just what people like him, the mentally disturbed, deserve to go through if that's what it takes for them to be cured.