The following are a cast of minor characters in the Atomic Robo comic book series.
Charlie Simmons
- First Appearance: Atomic Robo and the Fightin' Scientists of Tesladyne
Charlie Simmons was one of Robo's friends and fellow pilot during his time with the Flying Tigers in 1940. He was a known alcoholic, often challenging Robo to drinking contests, much to the fact that Robo doesn't have a mouth or a digestive system. He died from cancer in 2007, and her granddaughter sent Robo a letter and a picture Charlie took of him at that time, thanking the robot for being her grandfather's friend.
The President of Egypt
- First Appearance: Atomic Robo and the Fightin' Scientists of Tesladyne
The unnamed president made an appearance during a mission when Robo and his team of Action Scientists had to subdue a hostile, mechanical pyramid before it destroyed the city of Luxor. The president strictly told not to destroy it, but when that failed, he ordered his men to attack near them. When Robo proposed to forgo the fees to the mission, he was reluctant until another threat came along and drove his army away.
Carl Sagan
- Main article: Carl Sagan
- First Appearance: Atomic Robo and the Fightin' Scientists of Tesladyne
Carl Sagan makes multiple appearances in the series. He first came into contact with Robo when the robot proposed to him to build a device that could contain and study The Shadow From Beyond Time. He took a liking to Robo after that event and asked him three years later to examine the landing craft for the Viking I mission to Mars, offering to be its escort in space.
Jack Parsons
- First Appearance: Atomic Robo and the Fightin' Scientists of Tesladyne
Jack Parsons was an occultist rocket propulsion researcher who created a magic-powered spaceship and flew it over Southern California in 1947. Robo was able to stop him before the faulty design of the rocket caused it to crash into the city.
The Ghost of Rasputin
- First Appearance: Atomic Robo and the Fightin' Scientists of Tesladyne
Thomas Edison, envious of Tesla's success over his atomic robot, attempted to assassinate the robot using his Necrophone to summon the ghost of Rasputin and destroy the lab in the process. Robo was able to destroy the ghost by blasting it with a prototype Lightning Gun. Much like a spiteful, evil ghost, Rasputin spoke in a howling, Russian voice demanding Tesla's head.
Sargent Hovarth and Lieutenant Everett
- Main article: Lt. Everett
- First Appearance: Atomic Robo and the Dogs of War
Charles Fort
- First Appearance: Atomic Robo and the Shadow From Beyond Time
Howard Philips Lovecraft
- First Appearance: Atomic Robo and the Shadow From Beyond Time
Rex Cannon
- First Appearance: Atomic Robo and the Revenge of the Vampire Dimension
A slightly pompous, smug prospective employee of Tesladyne, his experience as a Marine and a Navy Seal as well as multiple PhD's in advanced, unknown fields piqued Robo's interest... until he got dragged down a pit of hungry vampires and presumably killed, serving as a catalyst for Bernard Fischer getting hired.