Pluto  

Sahad, プルートゥ

Pluto is a large metallic combatant robot featuring horns and red stripes on its face. Originally constructed for the purpose of annihilating the most formidable robots globally, including Astro, Pluto initially remained steadfast in fulfilling his assigned mission. However, as time progressed, he came to recognize that programming alone was insufficient and developed a camaraderie with Astro.