Would-be master of an equally wealthy rival house to the Hanaukyos, annoyed with the condition she would become master of her house if she married the head of the Hanaukyo family. She was even more enraged to find the current head to be a 'whiny midget,' but later grows to like him somewhat. She is a military fan and later strikes up an obsessive competition to beat Mariel and prove herself, to the point of joining the household as a maid. Her bluntness and short temper sometimes comes in handy. Naturally, Ryuuka's home seems to also have a vast staff, but of handsome men rather than cute maids.

(Taken from Wikipedia.org)