The fl was either an orphanage and was taken in by this guy who trains her how to fight, he treats her very roughly and will always pulls her pigtails. Than she was sent to be a Maid (she dress as a Maid but with short skirt) at a palace where she protects the prince or acts as a bodyguard. The prince seems sweet outwardly but I think he's smart and hiding a differnt side to himself

I read this a long time ago and it's a rather old manga. I believe fl has reddish pink hair while the prince had blonde? I don't remember much about the plot unfortunately as I didn't read long enough

Maybe Crimson Empire?

Is it like 70s, 80s or 90s?