No characters are assaulted but I do want to add that the princess looks like a minor (despite her being an adult) and she is in a romantic relationship with a character who appears to be twice her age (even though they are actually the same age their appearances may be triggering to someone who experienced statutory assault)
In various episodes in season two one of the side characters (Eagle Vision) throws up/coughs up blood due to a terminal illness he has. In the english dub it can sound a bit like gagging. This is a recurring plot point, but not the main focus
One of the main girls (Umi) mentions feeling nauseous or wanting to throw up when she sees one of the opposing country's warriors, finding them disgusting, but nothing ever happens
It's not pedophelia, but two older men (Ages unspecified, probably around their 20s though) both seem to have crushes on one of the main girls (Hikaru). She loves them both back and they're not ever creepy towards her, and she ends up with one in the end
A mage who seems old, and is probably one of the oldest characters, (Age still unspecified) is the love interest of one of the other main girls. (Umi) This is mainly felt on her side though.
And the third main girl (Fuu) also falls in love with an older side character who's probably 20-30s.
As mentioned, none of this is creepy and everything in consensual, but depending on how sensitive you are this might be worth considering
This is debatable on whether it counts, but there's a scene in an onsen where the girl get talking about breast sizes. The only comment about a minor here though is her saying she has no chest. (Minor says about herself)
And before that there's joking between an older girl and a boy who has a crush on one of the main characters about how "If he hadn't grown up he could have seen Umi in her birthday suit" but it's played for jokes
There's a scene where girls are in a bathhouse, and you can see their chests, but it's not detailed and the more intimate parts are covered
In two of the three openings the girls are unclothed for a short period of time, but magic covers their crotches and their chests are either hidden or undetailed, and this is very short before they're dressed in their clothes afterwards
At one point, a girl who would bully, attack, try to kill the main characters gets revealed to be a shadow of the main girl's heart. The main girl forgives her and accepts her back into her heart.
Not exactly forgiving an abuser, but worth mentioning
The age gap isn't specified, but older men are with 14 year old girls. Two of the men are probably 20s, MAYBE 30s. The other man is a mage and is probably older than the other two men
Eagle Vision/A side character has a terminal illness that causes him to cough up blood in fits. This is a recurring side plot that works as part of his motivation, but it’s not his whole personality or story.
He ends up dying in the end but in battle because he didn’t want to die from the illness and chose to go out fighting
Eagle Vision (a side character) has a terminal illness and doesn’t want to die without a fight so he goes out and fights since he’ll die anyways, throwing himself in the way of blows several times. He does end up dying