Yaiba, a golden fox Myumon, sports black-tipped ears, tail, muzzle, and inner ears, paired with sharp red sclera eyes and spiked hair. His small square glasses frame a face marked by quiet intensity, while his wardrobe—a sleek black jacket, pants, and shoes trimmed in white and gold—accentuates a dragon tattoo coiled across his torso and a sturdy wristband. His sentient bass, Ryukenden, mirrors a katana’s lethal elegance, its name "Legend of the Dragon Sword" hinting at its ambition to command Earth’s untamed creatures.

A self-styled lone wolf guided by rock’s raw spirit and bushido’s code, Yaiba masks a shy, lonely core shaped by childhood in a four-member family under his grandmother’s watch. Past jobs—supermarket clerk, record store employee, plastic model shop assistant—fueled a fascination with the robot Pundam, while the band "Hangyo DOroroppi~" ignited his bassist dreams.

Prone to inserting "hence" into conversations only to be cut off mid-sentence, he clings to childlike quirks like believing in Santa despite Rom’s corrections. Mornings find him at park radio exercises alongside elderly regulars, a ritual contrasting his outlaw persona. Bonds with bandmates Crow, Aion, Rom, and manager Maple Arisagawa subtly anchor him, defying his isolationist self-image.

Transformations amplify his mystique: the Nine Tails form drapes him in a robe-like cloth, red eye markings glowing, nine split tails swirling beside a golden pipe. Samurai Yaiba sharpens his gaze, adorning him with a gradient tail, blue waistcloth edged in gold chains, and intricate jacket detailing—each evolution echoing ancestral warrior motifs.

Master of the "Ryukitsune Blank Mind God Style" bass technique, he wields discipline as fiercely as his instrument. Though gruff, vulnerabilities peek through, like sheepishly seeking Rom’s encouragement during slumps. This fusion of rock rebellion, bushido rigor, and hidden tenderness weaves a layered identity, stitched together by family ties, humble jobs, and the relentless pursuit of musical legacy.