Carlos Barrios (カルロス・バリオス Karurosu Bariosu) is one of the former residents residents of the American Colony and current member of the Kingdom of Science. He works as a driver for Luna and the KoS on occasions.
Carlos is a muscular young adult with curly black hair which he covers with a white bandana. He wears a white unbuttoned shirt and has earrings on both sides.
Carlos seems to be of energetic, gleeful character. He seeks Luna's attention and praises her often.
Carlos is shown to have great persistence keeping himself awake for thousands of years in order to serve Luna.
He appears to have morals, as he and Max were startled by Stanley's intent on killing the enemies' science leader.
In the old world, Carlos worked as a driver for Lunas rich dad, however mostly drove her around alongside the bodyguard asigned to her, Max.
Luna, Max and Carlos were the event staff for the DARPA expo, possibly working under Lunas father. Carlos was going to give Luna a platinum ring. However he was not able to give it to her because he was petrified along with the rest of humanity for over thousands of years. Carlos retained consciousness by refusing to let Luna die single and persisted for over thousands of years. 
Carlos and Max accompanied Luna and Stanley through the forest. Carlos and Max tried to impress Luna with a display of strength by carrying the supplies, with her shrugging off their advances before Stanley tells her that she has to preserve her strength because she has a role to play. After gathering a good vantage point, he catches a glimpse of the Perseus and remarked that the science leader is nothing to Xeno. Carlos is nervous when Stanley insists on killing the leader. Moving the questions further, she asks why he needs her. Stanley explains that he will send Luna to spy on the Kingdom of Science to draw out the science user for him to snipe him. Carlos is scared by Stanley's preparation for a sniper attack.
Carlos stayed at the vantage point with Stanley and Max. Carlos was worried about how Luna was going to integrate with the crew of the Perseus. Carlos was notably disturbed by Stanley’s eagerness to assassinate the science user of the Perseus. when Luna tries to mouth the name Senku back to Stan, Carlos picks up on this with binoculars.
After Stanley 'assassinates' Senku, he leaves her behind, and leaves it to Carlos and Max to rescue her. Carlos and Max fight over who will follow the car dispatched by the KoS, however the car, with Taiju at the wheel, comes to them. Carlos then goes with him, however the language barrier prevents the two from talking much. Carlos notices how horrible Taiju is at driving and takes the wheel, showing off his expertise in driving. Once they arrive to Chrome and the rest, Carlos is tied up and gagged. Carlos gets shocked when he hears the work tunnel, and is even more shocked when he sees the KoS actually drilling a tunnel out. The KoS receive a message from Luna, who tells them Senku is her boyfriend. Upon hearing this, Carlos agrees to help and draws them a map of the American base.
Once the battle at the boat had ended, Carlos is seen giving directions to the KoS of how to leave the area. Luna, Max and the rest show up, and after a failed attempt to greet Luna does a handshake with Max instead. As the KoS escape, Carlos is shocked by Ryusuis sailing abilities. Carlos escapes with the KoS and officially joins their side.
Carlos helps the KoS chop down trees for wood. Carlos is there to meet Chelsea Childe, and facepalms himself when he hears she went south instead of north. When Senku says the motorcycles will run on wood, Carlos, being a driver, is shocked that wood is their fuel instead of oil. When escaping from Stanley, Carlos is one of the lead drivers. Ryusui notices how skilled Carlos is at driving and asks for his help creating a smoke screen to protect themselves. When Senku mentions they put sugar into the planes engine, Carlos recalls that many cars were damaged from sugar pranks, showing his knowledge of cars due to being a driver. Carlos watches as the plane narrowly crashes next to them
When sitting around a campfire, Carlos and Max are shocked at Ryusui knowing about the Rodex HQ location. Carlos and Max are later proud of Luna for being so skinny- BUT WAIT NOT WITH THOSE PROPORTIONS! They both cry tears of pride when Luna says she and Senku are dating like cool, capable adults, and sigh in relief when Chelsea points out she's just a tool. Carlos would ride with Max and Xeno when evening out the weights of the bikes. Carlos and Max ride the sky lifts with Suika, and react too late when a gust of strong wind pushes her off. Carlos would later need to splash Army Ant scent on himself much like the rest of the KoS, and are worried when Luna faints from the idea of that. Carlos travels all around the Amazon, and is present when they find the giant pile of medusas.
Carlos likely helps construct the stealth ship and the base in Araxa, though he is unseen doing so. When the KoS need to mine diamonds, Carlos drives Tsukasa to the mining field. Later when Luna is sent away in order to revive the KoS later, Max tries to bring her back but is stopped by Carlos, who realizes the real reason for sending Luna away. Carlos is not seen again after this, and is eventually petrified again alongside the rest of the world.
Three years later, Carlos' statue is collected by Suika who was revived earlier. She places Carlos with her other collected allies.
After the revival of everyone else, Senku revives Carlos, along with Max, Chrome, and Kaseki. Max watched as Tsukasa and Hyoga later hunted several animals and used their pelts to make new outfits for everyone. That night, he and Max watched Luna attempt to flirt with Senku at the celebration. 
When Xeno is revived, he and Max agree that he might betray them but Chrome disagrees with them.
|Male||Brody Dudley • Carlos Barrios • Leonard Maxwell • Max Adams • Stanley Snyder • Xeno Houston Wingfield|
|Female||Charlotte Bony • Luna Wright • Maya Biggs|