A Gundam knight who confronts the Genesis Army OZ World. He was formerly an android in a circus troupe and was known as Trowa No. 2. He questioned the way people treated others without regard for their own lives, and escaped with Trowa. He possesses cold-hearted judgment but lacks emotion. On his journey with Trowa, he seeks to regain something he lost. His special move is the "Spiral Buster," which spins the sword attached to his shield.
When the circus attempted to have Trowa perform a suicide show, Heavyarms felt a surge of sadness. He then attempted to escape from the circus.
Heavyarms's compassion for his comrades' peril fueled his fighting spirit, unleashing his hidden power. He spins not only his sword but his entire body as well, and challenges the Genesis Army OZ World with a new special move.
Blessed by the Fighter Double Zeta Gundam, Heavyarms's knowledge of sadness has given rise to immeasurable power.