Kokujun Sa

Kokujin Sa is the youngest of the three brothers, whose kindness is regarded as a weakness by his family.

He reminds Lady Eiki and Sakujun of a young Enjun. Kokujun is fond of his cousin Shunki, and he releases Seiran and Ensei from confinement so they can rescue her. However, Ensei lectures him harshly for letting others risk their lives, encouraging Kokujun to take action himself. As a result, Kokujun safely brings Eigetsu and Kourin to Kinka, concealing his knowledge that Kourin is not really the female co-governor.

When the ring of the Sa clan is recovered, Kokujun takes on the leadership of the Sa clan with Shunki's support. He is close friends with Ryuuren Ran, who is the same age as Kokujin, and admires Ryuuren greatly.

(Source: Wikipedia)