Casio Takashiro, once a Topless pilot now serving the Fraternity as a Buster Machine mechanic, previously commanded Dix-Neuf before passing it to Lal'C Mellk Mal. He sports short blonde hair, a goatee, and is always seen wearing a hat and sunglasses. Losing his Topless abilities upon adulthood inflicted deep psychological trauma, leaving him feeling useless and unable to pilot. He channels his unmatched technical expertise into maintaining the machines behind the scenes, his knowledge exceeding that of active pilots.

Maintaining a cool, detached exterior often expressed through casual or flippant remarks, Casio masks significant internal struggles yet performs his duties professionally. His experience grants him deeper insight into the Fraternity than current pilots possess. His relationship with Lal'C, once that of mentor and hero, deteriorated over time, fueled by his unresolved trauma and bitterness over his lost powers.

His profound connection to Dix-Neuf endures. The Buster Machine, an enduring relic, bears battle scars from his era: a Space Monster fragment lodged in its right eye. After his piloting ended, its severely damaged right arm was replaced with a mechanical prosthetic. Casio retains unparalleled understanding of this machine's capabilities and history. Currently alive, he continues to grapple with the emotional fallout of his faded glory, embodying the transient nature of Topless powers.