Saralegui

The young king of Small Cimaron who asks Yuri to call him Sara. He is extremely beautiful and at first glance seems soft-spoken and kind-hearted. He's already at adult age but still uses 'boku' which is usually used by young males when referring to themselves. He can't remember much about his parents. He has the power of hypnosis, which he tried to use on Yuri, but with no effect. His first appearance was in the anime was during the third season where he meets a disguised Yuri at a ball. The two become friends despite misgivings Yuris friends have concerning the human king. During Yuri's visit to Small Cimaron, in what appears to be a selfless and heroic act, Sara takes an arrow in Yuri's place.

Yuri is moved and even Wolfram, who had previously shown a strong dislike towards Sara, is touched by the young king's attempt to protect his fiancé. Murata and Conrad still remain suspicious of Saralegui's true motives. It later becomes clear that Berias was the one who fired the arrow as part of a plan Sara concocted in order to gain Yuri's trust. As Lanzhil declares war on Shin Makoku, Sara finally reveals his true colors, using his power to manipulate Yuri into attacking a fleet of Big Cimaron battleships. His betrayal leaves Yuri completely shaken. Yuri soon decides that he will still trust Sara and he will continue trying to be good friends with him.

And apparently, Saralegui's mother is the current leader of the White Crows. They meet again in Shin Makoku when she tries to take Yuri away, but when she sees Saralegui, she whispers his name before fleeing. At the end of the Series, Yuri's life is saved by Sara, making up for all the wrongs he had done towards Yuri and also gaining the gratefulness and trust of Yuri's friends. (Source: Wikipedia)