Buntarou Kishi

About

A young man who joined the Seifu Mountaineering Club because of his admiration for Habu, who was isolated there because of his intense personality and like Habu, he lost his parents at an early age. He became Habu's climbing partner and had a good relationship with him. Although he was a good climber, he slid down and eventually fell to his death whilst climbing with Habu. After the accident Habu withdrew from the Seifu Mountaineering Club and the experience caused him to become more solitary.

(Source: Wikipedia, Mangapedia)