Ryuuka Jihiyou hails from the wealthy Jihiyou family, a rival house to the Hanaukyo clan. Her path to becoming the Jihiyou heir apparent hinges entirely on marrying the Hanaukyo head, a condition that initially fueled her annoyance. Discovering the current head was Taro, whom she scorned as a "whiny midget" due to his youth and stature, ignited outright fury and disdain within her.

She possesses a blunt personality, a notoriously short temper, and a keen fascination with military strategy; these traits occasionally serve her well in confrontations. Driven by fierce ambition and a competitive fire, Ryuuka fixated on surpassing Mariel, the Hanaukyo head maid. To prove her superiority, she took the drastic step of joining the Hanaukyo staff herself, eventually rising to lead the mansion's physical health division.

Despite her initial contempt, Ryuuka's feelings toward Taro underwent an unexpected shift, evolving into a degree of fondness evident in her lingering presence. This change culminated in her proposing marriage to him, and famously, an accidental kiss occurred when she tripped. Her rivalry with Mariel often erupted into physical contests, like a swimsuit cavalry battle. Her aristocratic roots manifest in haughty mannerisms, including a signature "Noblewoman's Laugh" (often rendered as "ho ho ho"), reflecting her refined upbringing.

Her family estate starkly contrasts with Hanaukyo, staffed exclusively by handsome male servants rather than maids. Her character incorporates comedic elements, such as displaying a "Demon Head" – a visual representation of exaggerated fury – when challenged, particularly when questioned about her loyalties after requesting to join the security maids despite her family ties.