Meng Kai

Gai Mou is a Great General from the state of Wei. He is a part of the Seven Fire Dragons of Wei that were Generals who were fighting with Zhao's Three Great Heavens and Qin's Six Generals. However internal fights occurred between the Seven Fire Dragons and soon Gai Mou, Shihaku and Rei Ou killed three other generals, while Go Kei left the group. For this, the three surviving generals were punished with 14 years in an underground prison. (Source: Kingdom Wikia)