Shinobu しのぶ

Shinobu, who is Mikoto's real sister, is a ninja, but became infatuated with samurai and set out on a journey to train herself. Because of her horrible sense of direction and clumsiness, she gets lost deep in the forest and does not find out about Ikuto's arrival until much later. Hearing that Ikuto's a great sword master who defeated the Leader of the North in a swordfight, she stubbornly persists in her request to spar with Ikuto for days until he agrees to do so. After Ikuto 'defeates' her, she becomes Ikuto's disciple in swordsmanship, owing again to her extreme stubbornness that Ikuto doesn't wish to put up with after already experiencing it. Because Shinobu is so obsessed with becoming strong and sparring, she doesn't know 'love'.