Ryouko Kishi

About

Buntarou Kishi's younger sister and Jouji Habu's ex-lover. After being present in the death of her brother and his ordeal on the Grandes Jorasses, Habu entrusts his journal to her. Soon after they started a romantic relationship. She kept her feelings for him and continued to wait for Habu after his disappearance. Having meet Fukamachi who was researching Habu's past, she goes to Nepal with him to find Habu.

(Source: Wikipedia, Mangapedia)