Kai Meng

Gai Mou is an easy going laid-back General who only goes on the battlefield if he finds someone interesting to duel. He is very boastful to the point of even saying lies about his strength.

He also appears to be rather dense often having his lieutenant Jun Sou chiding him on his incompetence. An example of this is shown when he misinterprets Jun Sou's explanation about Shin going as far to assume Shin killed Ou Ki and Kyou. Another example of his simple-minded attitude is when he yelled his name and rank at the Hi Shin Unit in hopes of having a one on one duel with Shin at the risk of giving away his location to everyone (which was ultimately successful).

Gai Mou is also rather lecherous as seen when he is indulging himself with four girls (claiming to be making up for 14 years of being imprisoned) before clashing with the Hi Shin Unit. He is later seen with them again when he questions Ka Ryo Ten after having some action with his concubines.

Philosophically, he sees Ren Pa and Ou Ki's opinion of war as a struggle of dreams and sentiments as a delusion meant to disguise the slaughter for what it really is. Thus he concludes that war is just a practice where the strong slaughter the weak. With this, Ou Ki and Ren Pa never took his challenges to duel him seriously and would withdraw as he didn't have a reason to fight that was worthy enough for them to consider.

(Source: Kingdom wiki)