Musica is the leader of a notorious gang of thieves known as the Silver Rhythm, based in Punk Street. He pilots a flying ship named the Advent and initially sports long brown hair, which he later changes to a shorter, black, spiky style. He has three distinctive piercings above his left eyebrow and always wears a skull necklace that doubles as a weapon, enhancing his silver-claiming abilities. Musica first encounters Haru Glory and Elie when Haru seeks out Musica the Blacksmith to repair his broken sword. Elie mistakenly assumes he is the blacksmith.
Though he helps Haru rescue Elie from Lance, he initially declines to join Haru's group. However, their paths cross again when Musica assists in defeating an assassin targeting Haru and Elie, and later helps Haru defeat Shuda and his followers. This leads to him officially joining Haru’s team, where his powers and combat skills significantly bolster the group's strength. Musica and Haru form a formidable duo, with Musica proving to be a loyal friend and ally in Haru’s quest for the Rave Stones while pursuing the Silver Ray.
Musica shows unwavering loyalty, exemplified by his actions when one of his subordinates, Snake, was caught during a robbery. He turned himself in to free both of them. Despite his flirtatious nature towards beautiful women, Musica never wavers in his support for Haru. He bears the Musica family tattoo on his left shoulder, symbolizing his heritage.
In his youth, Musica's family was massacred by Lance, "The Beast Sword" of Demon Card, using a sword crafted by Musica's grandfather, Galein Musica. Orphaned, he was taken in by Rize, a silver-claimer who trained him in the art of silver-claiming. On his deathbed, Rize asked Musica to find and destroy the Silver Ray, a request Musica honored. He eventually discovered that the Oni Fortress River Saly was actually the Silver Ray in disguise. After battling the oni leader Ogre, Musica destroyed the Silver Ray with Reina's help. The weapon was reborn as an artifact, "The Ocean-Rending Spear, Silver Ray," now fused with Musica and Reina’s silver.
Musica shares a familial connection with Galein Musica, the blacksmith. Though they briefly met in Punk Street without acknowledging their relation, both were aware of their kinship.
