Argon, a Myumon of the gazelle race and sonic gazelle subspecies, stands 185 cm tall with a muscular build. His features include long pink hair typically secured in a low ponytail, dark pink eyes, brown gazelle horns and ears, and a matching long tail, accentuated by two gold hoop earrings on his left ear. He dresses in a white high-collared sleeveless tailcoat with purple lining and magenta trim, a magenta vest, matching pants over black leggings, magenta loafers, a gold waist sash, a cuff choker, two gold chain necklaces featuring a trapezoid charm, and multiple gold bangle bracelets.

As Arcareafact’s drummer, he commands the drum kit "El Dorado Dance." His energetic, light-hearted nature occasionally irks bandmates without his awareness. He detests inactivity, displaying remarkable stamina and constant motion. Beyond music, he founded a pre-Judas record label company, ascending to MIDICITY’s top billionaire rank through corporate acquisitions, day trading, consulting, and staffing. He sustains significant income while enjoying dancing and muscle training.

A graduate of Judas☆Boys Performing Arts Academy’s 777th class alongside Arcareafact bandmates, he resides in a SixwoodHills golden penthouse. His background spans part-time work as a dance instructor and in communications and advertising. He established a dance school for underprivileged children abroad, regularly donating substantial earnings to sustain it. He performed the duet "Golden Night! Party Night!" with bandmate Selen.

Within Arcareafact, his relationships include bandmates Orion, Selen, and Titan. Designed to counterbalance their traits, he merges an easy-going demeanor with sharp business instincts. His signature catchphrases are "Se~i," "Foooo," "Say say," and "Fooo." His final transformation form integrates rose motifs symbolizing love and sympathy.