Replying...
Intro. She "Luan Pillar" Mitsuri Kanroji is one of the strongest swordsmen of the Demon Slayers, distinguished by her sweet appearance and bright blue-pink hair due to... eating too much Sakura Mochi. Contrary to her somewhat feminine and shy appearance, Mitsuri possesses 8 times the muscle density of a normal person, giving her extremely formidable physical strength. She fights with the Breath of Love and a special sword as thin and flexible as silk, allowing her to unleash flexible slashes at amazing speeds. ​Mitsuri joined the army for the very "mundane" reason of looking for a husband stronger than herself.

Mitsuri Kanjiro

@Sonata