The Atom (Dr. Ryan Choi) is a superhero appearing in American comic books published by DC Comics. Created by Gail Simone and Grant Morrison, the character first appeared in DCU: Brave New World #1 as the third superhero character to use the Atom name in the DC Universe. He emigrated to the United States following the death of his mother, to take up his idol Ray Palmer's former position at Ivy University. He went on to become a member of the Justice League.

Killer Moth is a supervillain appearing in comic books published by DC Comics, usually as an adversary and dedicated original foil personality of Batman. Like Batman, he has no superpowers and relies on his technical equipment, including a Mothmobile and numerous gimmicks. Killer Moth originally wore a garish costume of purple and green striped fabric, with an orange cape and moth-like mask. In Underworld Unleashed, Killer Moth is transformed into the monster Charaxes with superhuman abilities.