Atom is a highly advanced robot loosely inspired by Osamu Tezuka's Astro Boy, though the version in Pluto is significantly more developed. He's consistently ranked among the world's top seven robotic technological achievements—his design is so sophisticated that even Gesicht's advanced sensors struggle to tell whether he's actually a robot or human.
Uran is his sister.
In the series, Atom partners with Gesicht to investigate a string of murders and uncover what's really going on behind them.
Content compiled by AnimeList.moe from publicly available sources.
