The Japanese title translated as "Learn Swordsman" is 剣聖 Romaji "kensei" wherever the first kanji signifies "sword" and the 2nd a single i.a. 'priest', 'sage' or 'learn'. The most organic translation might be "swordmaster", and Japanese has no feminine counterpart (cf. За кулисами подачи к столу (яп. お膳立ての舞台裏 О-дзэндатэ но http://edgarclsqs.blog5star.com/8793544/5-essential-elements-for-re-zero-kara-hajimeru-isekai-seikatsu