اتوم

Loosely based off of Osamu Tezuka's classic character, "Astro Boy," Atom in the Pluto series is a highly developed robot. He is constantly classified as one of the worlds top seven robotic technological advances in science, to the point that even Gesicht's sensors having trouble distinguishing him as a robot or human.

He works with Gesicht in order to help discover the truth behind the recent chain of murders.

He has a sister, Uran.