One person: Orochi, starting with Feng Baobao's Eight Heroes.

Chen Qi transmigrated to the world of "Under One Person" and obtained Orochi's perfect body and abilities from "The King of Fighters '97".
Levitation, dodge, blade kick, divine finger, rebound wave, spiritual spring, black particles, soul extraction, sunlight shining...
At the beginning of the story, he met Ruan Feng, who taught him the Six Treasures of the Immortal Thief. In 1952, he found Bao'er Jie, who was still waiting in the mountains, and turned her into his "Eight Heroes".
Later, Chen Qi and Bao'er joined the company to search for their bloodline, the "Eight Heroes," and found Chen Duo of the Medicine Immortal Society.
But gradually, Chen Qi discovered that the former 36 thieves all seemed to have seen him, or rather, seen 'The Great Serpent,' Ruan Feng, and Zhang Huaiyi, in the 24 Valleys.
There seems to be some secret between the 'Eight Extraordinary Skills', the 'Eight Heroes', and the 'Great Serpent' that Chen Qi is unaware of.
Feng Baobao, Chen Duo, Xia He, Er Zhuang, Feng Boming, Lu Linglong...
Chen Qi was collecting the 'Eight Extraordinary Skills' while searching for his own 'Eight Heroes'...