Ruhuyu, a wolf Myumon, radiates cheerful dedication as a trusted, compassionate honors student, masking inner struggles against parental pressures and destructive impulses that occasionally surface, sparking whispers of her latent danger. Her melodramatic impulsivity intertwines with a whimsical claim of personality shifts under full moons.

She sports long lavender hair tied in a ponytail, teal eyes, caramel skin, and a fluffy lavender tail. Her midnight blue and white outfit pairs with black stockings, dark violet boots, and indigo paws featuring pink pads. As both drummer and vocalist, she animates her performances with the "Lunatic∞Overload" drum set, punctuating beats with playful cries of "Lunatic Razzle Dazzle"—a flair without tangible effect—and the mock-threatening "Rice Shower Attack."

Her bond with bandmate Delmin thrives on friction and resolution, exemplified by a quarrel during independent explorations that mended through shared song reflections and apologies. Their partnership resonates in duet "No Problem!!" and solo tracks "Last Judge" and "Cinematic Memoir." Ruhuyu’s teasing humor surfaces when prodding Himeko and Howan over their banter’s romantic undertones.

Though harboring a lighthearted dream of future marriage, she rigorously pursues drumming mastery, chronicled in video series "The Road to Ruhuyu’s God Drums!" and her active Twitter. Spontaneous curiosity guides her through Midi City’s Pyuru Land and music shops, embodying her vibrant, restless spirit.