Hakuryu forms one-third of the Three Color Dragons, a sibling triad serving as warriors under Klaus Daggats within the Spiral Palace. As the middle sister, she masters Chinese martial arts alongside her elder brother Kokuryu and younger brother Kouryu. The trio occupy a private mini-palace nestled in the Spiral Palace grounds, featuring a tranquil lake that mirrors their cultural heritage and combat identity.

During a clash in Grazia, Hakuryu hesitates when commanded to engage protagonist Taito Masaki—a moment of uncertainty that diverges from her siblings’ unwavering adherence to their mission, suggesting latent tensions regarding their role in Klaus’ ambitions. While her history before joining the Spiral Palace remains undisclosed, her actions remain tethered to her loyalty to the Three Color Dragons. Her arc unfolds through critical choices made during pivotal encounters in the series’ core narrative.