Chun Ryeo is a cyborg martial artist who reached enlightenment through extensive training.
He was previously exiled from the Just Heaven clan after being framed by the eldest disciple, whom he trained with. In the process, he was ordered not to use the clan's martial arts ever again. His limbs were severed, and his energy core was destroyed. He also suffered from serious external trauma including major fractures throughout his body. An old master discovered Chun Ryeo, but it was too late for him to be saved by ordinary measures.
Chun Ryeo received surgery that changed most of his body into a cyborg. Since the cyborg surgery theoretically suggested immortality, many coveted it. But Kamazon was strictly reserving the chance for a selected few. Originally, the old master was to be the recipient after helping Kamazon's Director Luiz, but he yielded the chance to Chun Ryeo after seeing him on the brink of death. The surgery was a success. Not only was Chun Ryeo able to carry on with his life, he could also continue practicing martial arts.
Chun Ryeo deeply respects the old master. This is because through him, Chun Ryeo was able to obtain a new body as well as find purpose in life when he wandered after achieving revenge. To Chun Ryeo, who believed he was alone after losing his parents at a young age, the always-righteous old master became his role model. The degree to which Chun Ryeo respects the old master is reflected in the martial arts he created, as the name itself is from the old master's Dharma name, 'Shen Mountain'.
The Shen Mountain Fist being called an unmatched martial art is due to its power as well as its broad application. The Shen Mountain Fist was created with the martial arts of the Just Heaven Clan, which deal with extreme yin, the teachings of the old master which deal with extreme yang, and Chun Ryeo's own enlightenment. Thus, it can flexibly tackle any situation or enemy. Moreover, as Chun Ryeo himself is a human turned cyborg, it is said that both humans and androids can acquire the martial arts he created.
In the past, Chun Ryeo's whereabouts could easily be tracked through his participation in various volunteer work. But after his master 'Shen Mountain' reached Nirvana, he vanished without a trace. As a result, rumors such as 'He returned to civil society due to the grief of his master's passing.', 'He secluded himself to gain deeper understanding.', 'He escaped in the middle of the night with a long, blue-haired woman.', etc. have circulated, but the truth has yet to be revealed.