SAIKYOU NO KENSEI, BISHOUJO MAID NI TENSEI SHI HOUKI DE MUSOU SURU

Arnoick, the strongest Sword Saint in history, has died. His sword techniques were passed on to his disciples, and it was thought that his story had come to an end— But then…! Arnoick is reincarnated as a breathtakingly beautiful maid named Annette! With her slender arms and frail body, she should have given up the path of the sword and lived a quiet, peaceful life. However, in order to protect Rosalena, the daughter of a fallen noble family, she rises up broom in hand. An ultimate do-over fantasy of the strongest warrior reborn—from old man to beautiful girl! (Comic Gardo Translated) — Description from AniList community (anilist.co).