Responses
ANOTHER MYSTIC PRINCE FANNNN! You just reminded me that I should reread it.
Anyway:
https://www.mangago.me/read-manga/emperor_and_the_female_knight/ maybe this?
https://www.mangago.me/read-manga/irregular_empress/ or this?
Otherwise, if you mean that she cross-dresses, it might be in my list of Gender Bender, there are a LOT of such stories with a similar plot:
https://www.mangago.me/home/mangalist/1609295/ just look at the ones with a "Cross-dressing" label
I've been looking for this manhwa where she is pretending to be a knight. It's a historical manhwa, the ml is a king or emperor and the mc is like a guard with the king. It's like mystic prince but mystic prince is top tier