Slight spoiler ahead....
I saw in the raws and I think they as in the whole army or are least the ones that has encountered the FL knows she has killed none and when she sees captured people (I think) being extremely maltreated by her side, she tries to sneakily help them. Apart from that I think it's common knowledge that the prince (was it? the one that enslaved her) is a total trash and has multiple people under his curse or something. Regardless, I do think is kinda weird how everyone is nice, usually in historical fantasy manga, enemies hate each other to even normal citizens, ofc soldiers would have more hate as they are in the front lines. More into the story there appear people that resent her but it quickly resolves.
I like the art but like the people before me said... There's smth I don't like abt the characters. Maybe cuz it feels as if they're taking the matters of war a bit too lightly? They are too trusting of e/o and the ml should show at least bit of contempt towards her for being apart of the enemy kingdom no? N in a war how can u keep tabs on someone whether they kill people or not especially the if it's from the enemy's side. Ur too busy fighting for ur kingdom n caring for ur comrades ain't no way u'd be that friendly towards her from the get go.
I get ut she looks innocent, cute naive n pitiful whatever u may say but don't u have a bit of distrust towards her in case it may be an act??
Idk I'm trying to make sense out of my unknown discomfort but overall I'll still keep on reading and see where this is going. The characters are pretty and I'm a sucker for pretty. Lol