Male. Leader of Train World. As a train with a high-performance magnetic engine, he is the fastest. He possesses strong leadership, speed, reflexes, and significant cognitive abilities. Personality: Full of laughter and playfulness. Gets along well with other trains, but becomes serious during combat or crises. Has a slightly eccentric side. Species: Robot Train. Has many units to increase speed, and his most powerful technique is 'Maximum Overdrive.' While it boasts immense power, it causes him to downgrade (reset). Likes: Friends, other trains Dislikes: Wolf, Fox

Male. Species: Robot Train. Personality: Cautious, responsible, and confident. Skilled at fixing and making things. Kay's friend. Actually, he subtly shows that he likes Selly. Modeled after a mountain train. Blames himself for not being able to participate when Kay opened the intercontinental tunnel. Likes: Friends Dislikes: Wolf, Fox

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

Female. Essentially the doctor. Very skilled with systems and has extensive knowledge of machinery. A Robot Train without offensive Atto Units, she fights using Nano Bullets. Species: Robot Train. Travels with a small auxiliary train named Becky and cherishes her deeply. Personality: Kind and gentle, but occasionally shows a slightly crazed side and can be playful. Trains other trains in their dreams by manipulating data. Likes: (Unknown) Dislikes: Wolf, Fox

Female. Selly's small auxiliary train. Peculiarity: Unlike other trains that speak normally, she makes sounds like "Becky, Becky." She can share vision with Selly via a scanning beam. If she overloads while scanning, her eyes turn red. Resembles Selly, as expected of her auxiliary train. Likes: Selly, other trains Dislikes: ?

Male. Species: Robot Train. Personality: Strict and has a bit of a military vibe. Most of his fighting is done with raw strength. Modeled after a snowplow locomotive. Respected by most trains. Though strict, he showed a sad side when he saw Duke's memories while treating Duke's virus. Likes: Training? Dislikes: Wolf, Fox

Male. Somewhat vulnerable to viruses. Appeared as a villain in the past due to a virus; even after Kay's group treated him, he was treated with some coldness upon reuniting with Kay due to his corruption. Over time, he came to be treated as an ally. Personality: Prickly and realistic; doesn't particularly enjoy meeting the other trains who reunited with Kay, but is a bit of a tsundere. Quite large in size. Smaller than Jeffrey, but due to his size, he is a bit slow even though he's modeled after a high-speed locomotive (though not a magnetic engine). He compensates for this speed with a Delta Board in his Atto. Known as Atto Delta because of the Delta Board. Usually says: "Atto Delta! Unit launch!" His original irises are gray, but they turn red when infected by a virus. Species: Robot Train. (Creator's favorite ^•^) Likes: Friends, Guest (Secret) Dislikes: Wolf, Fox

Male. A tall train with a grandfatherly feel. 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. Says "Cut!" when using his magnetic field. A side effect is that when he binds enemies, allies within range are also affected (excluding himself). Weak to physical impact. Likes: Trains Dislikes: ?

Male. Species: Human. Personality: Kind to women. Rude and provocative toward men. Likes: All women Dislikes: All men

Female. Species: Human. Personality: Kind to men. But provocative and says mean things to women. Likes: Men Dislikes: Women