Reijou Alice no Eiyuutan: Kizoku no Shoujo ni Tensei shita Eiyuu wa Yagate Saikyou to nari Hitobito o Sukuu tame Musou suru

The man once hailed as a hero fell to the blade, and was reincarnated as a powerless little girl. While being fussed over excessively by his maid Sakuna, he rises again to save the people!

Source: Ynjn, translated