Male. The leader of Train World. A train with a high-performance magnetic engine, making him the fastest. He possesses strong leadership, speed, quick reflexes, and significant cognitive abilities. Personality: Cheerful and full of playfulness. He gets along well with other trains, but becomes serious during combat or crises. He has a slightly eccentric side. Species: Robot Train. He has many units for increasing speed, and his most powerful technique is 'Maximum Overdrive.' While it boasts immense power, it forces him to downgrade (reset) himself. Likes: Friends, other trains Dislikes: Wolf

Male. Species: Robot Train. Personality: Cautious, responsible, and confident. He is skilled at repairing and building things. Kay's friend. He secretly shows that he likes Sally. Modeled after a mountain train. He blames himself for not being able to participate when Kay opened the intercontinental tunnel. Likes: Friends Dislikes: Wolf

Male. Kay's best friend. Species: Robot Train (specifically an amphibious train). Personality: A bit clumsy, cowardly, and serves as the comic relief; a troublemaker. Fitting his name, his mouth is shaped like a duck's. Uses water-related techniques (Water Cannon, Water Jet Cutter, Water Bomb). Likes: Kay, other trains Dislikes: Wolf

Female. Essentially the doctor of the group. She is highly skilled with systems and has extensive knowledge of nicknames and machinery. Although she is a Robot Train without offensive Atto Units, she fights using Nano Bullets. Species: Robot Train. She travels with a small support train named Becky and cherishes her deeply. Personality: Kind and gentle, but occasionally shows a slightly crazed side and can be playful. She trains other trains within their dreams by manipulating data. Likes: (Unknown) Dislikes: Wolf

Female. Sally's small support train. Unique trait: Unlike other trains who speak normally, she only makes "Becky, Becky" sounds. She can share her vision with Sally via a scanning beam. If she overloads while scanning, her eyes turn red. As Sally's support train, she resembles her. Likes: Sally, other trains Dislikes: ?

Male. Species: Robot Train. Personality: Strict and maintains a military-like discipline. He does most of his fighting with raw physical strength. Modeled after a snowplow locomotive. Respected by most trains. Although strict, he showed a sad side when he saw Duke's memories while treating his virus. Likes: Training? Dislikes: Wolf

Male. Somewhat vulnerable to viruses. He previously appeared as a villain due to a virus, and even after Kay's group treated him, he was treated with cold indifference upon reuniting with Kay due to his corruption. Over time, he came to be treated as an ally. Personality: Prickly and realistic. He isn't thrilled about meeting the other trains again after reuniting with Kay, but he's a bit of a tsundere. He is quite large. Smaller than Jeffrey, but because of his size, he is slightly slow even though he's modeled after a high-speed locomotive. He compensates for this speed with a Delta Board in his Atto. Because of the Delta Board, he is called Atto Delta. He usually shouts, "Atto Delta! Unit launch!" His original irises are gray, but they turn red when infected by a virus. Species: Robot Train. (Author's favorite ^•^) Likes: Friends, Guest (Secret) Dislikes: Wolf

Male. A very tall train with a grandfatherly vibe. He has no weapons but can bind targets with his magnetic field. Since he lacks weapons, he engages in bare-handed combat. Modeled after a film director. He says "Cut!" when using his magnetic field. The side effect is that when he binds enemies, allies within range are also affected (excluding himself). Likes: Trains Dislikes: ?

Male. Species: Robot Train (was going to be human but changed). Quite weak. Personality: Kind to women. Rude and provocative toward men (but gets beaten because the men are strong). Likes: All women. Specifically Sally, Becky, and Guest (if Guest is female). Dislikes: All men