Ruslan is a guy who joins Mari and Raynophel in the search for the missing legendary princess. He is the best friend of Gerhard.
Later though, it is revealed that Ruslan is the "bloody" King and husband of the legendary Princess, but he was also cursed by her 600 years ago. It is hinted that the curse turned him into a girl. Also he is the only one that knows the true personality of the princess and bears a grudge against her because she killed his mistress which was the only woman he ever loved..