Even the Captain Knight, Miss Elf, Wants to be a Maiden. is a Manga/Manhwa/Manhua in english language, SUGGESTIVE series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

But the acting captain of the knights is an elf woman, itself?! Enjoy the days of Gilga-san, the strongest and coolest, but in fact a maidenly, innocent elf captain knight!!