Yuuri
- Appearance: Yuuri has fair skin and really long shiny black hair that he keeps tied in a long braid that reaches around mid-thigh. His eyes are light blue. In every physical aspect except his hair, he is identical to his older twin brother, Yuuki. (Though it is later revealed that Yuuri's hair color might not be different at all! It seems, in order to separate himself from his twin, he has always dyed it black. A secret that was kept longer than the secret of Yaori's lineage!)
- Fashion: Yuuri dresses mainly in black clothes that cover everything but his hands and head. His fashion sense is very conservative; he mainly wears very similar outfits but even when he wears something different it is normally still a well-tailored conservative outfit. The end of his braid is normally tied with a dark navy bow. Like the others he also has incredibly fancy formal wear.
- Abilities: Like his brother, Yuuri is best with magical skills. His ability to use it is extraordinary, so much so that he rarely has to resort to more physical combat. Out of the two, Yuuri is normally more attack-based in his magic skills than his brother, who is much more defense-based.
- Home & Family: Yuuri comes from a country that has a very high rate of twins (an unbelievable 80% rate of double births!) In this country it is tradition for the younger twin to always obey the orders of the elder twin; as you can imagine this can cause quite a bit of trouble, but tradition is tradition, and its almost an outright law! Good thing Yuuri has such an understanding and kind brother! Yuuri does not talk of his home life much, what is known is that they lived till around age six with their mother and that they were very cute children! Yuuri however seemed to constantly be jealous of Yuuki's intelligence and ability to succeed and receive praise easily.
- Castle Life: Yuuri, like Yami and Yaari, has no particular job at the castle, mostly just spending his days helping out and keeping things in order. His room, like the others, is gigantic and he makes sure to keep it looking nice; well decorated, tidy; altogether very pleasant.
- Bio: Yuuri is a bit of a perfectionist, he constantly tries to keep everyone at the castle doing what they're suppose to and acting how they're suppose to. He always follows the rules to a T and expects others to do the same. In this he is very similar to the King's guardian Raphael. Yaari, being more of a free-spirit when it comes to things and not liking rules at all, likes to pick at Yuuri for this and takes every chance he can to annoy him. Yaari also tends to make very obvious passes at Yuuri, much to Yuuri's annoyance. Although, he can never seem to figure out if any of Yaari's teasing is based on actual feelings or not. Yuuri also has trouble catching onto innuendos, jokes, and people's personal relationships which makes it very easy for the others, especially Yaari, to pick on him. It is later revealed that at one time Yuuri had strong feelings for the Princess and was even jealous of Yami when he first started being close to her. He is also the last to catch onto their relationship, only catching on fully just before the King does. Later, after he realizes how happy the Princess is with Yami, he gives up on his feelings for her. The fact that he even had such feelings in the first place is in itself a contradiction to his own words that a guardian should never attempt to be more than he is supposed to be. Perhaps this just shows that Yuuri is a normal person with his own feelings and not just someone who would blindly follow the rules like he appears to be.