★ World of Trains †

Kay is the team's main leader, whose design embodies speed, technology, and energy. He appears swift, streamlined, and friendly.
Kay's color scheme: Dark cobalt blue with white and yellow accents.
The top of the head is shaped like the cabin of a high-speed train (inspired by the Shinkansen) or the fuselage of an airplane. A distinctive white or yellow crest or stripe is often located on the forehead.
Large, expressive, with white sclera and dark pupils. Unlike Duke's red eyes, Kay's gaze is usually open and determined. The shape of his eyes has changed in some seasons.
The lower part of the face (chin) has a smoother, rounded shape compared to the angular "visor" of the Duke.
The body is slimmer and more aerodynamic. The chest often features white panels, and the waistband or chest may feature elements reminiscent of train headlights or indicators.
His limbs are thinner than Duke's. Instead of jet turbines on his wrists, K may have manipulators or tool-handling devices (he's a tunnel builder, after all). His arms can transform in combat mode or when using his powers.
The legs are slender, with distinctive wheels on the feet (in robot form, these often fold up or serve as a means of propulsion). When transformed into a train, the wheels become the primary propulsion device.
Magnetic Motor: Although not always visible from the outside, its motor is a key design element that allows the tunnels to open.
Transformation: Like all robot trains, Kay transforms into a locomotive. In train form, he looks like a modern, blue-and-white high-speed train.

Thanks to his magnetic drive, he is the fastest of all the trains, not only in speed but also in maneuverability and improvisation. Because of this, other trains sometimes spring unexpected surprises, and even during battles, they employ high-speed combat, which emphasizes speed over technology. As a leader, he is altruistic, courageous, and decisive, but sometimes his overconfidence leads to recklessness and rashness. Unlike Alf, he is very emotional. Furthermore, like other cartoon characters, he believes in his friends, places great value on trust, and is strong-willed.

Magnetic Engine: It is described as a super-efficient organ with superior capabilities and is the reason why Kei can act as a leader, as well as the basis of his abilities.
Lever block: a device mounted on both arms. When you operate the booster and lean back, you can increase speed using additional traction. You can also use the booster's reverse injection technology.
Back Unit: A device mounted on the back. Kei's primary booster allows for explosive speed. It is active during most robot mode techniques. The white secondary booster, mounted underneath, can be upgraded to increase speed.
Roller skates (foot unit): a device attached to Kay's feet. This device allows you to move as if you were skating. It allows for increased speed compared to regular walking.
Booster Power: This controls the arm and back booster. This technology utilizes the basic functions of boosters, such as acceleration, but can also be used to attack an opponent by strengthening the body with a booster and increasing the effectiveness of a breakthrough. This technology is used by Kei.
Booster Reverse: Extend your arms forward and activate the booster to project energy forward. This can be used to knock back enemies or destroy materials.
Magnetic Levitation Wheel – skill activation. Intercontinental passage utilizes technology to transition to "inertial mode" after the matrix accelerator. Magnetic wheels are used for airborne entry.
Reverse Corkscrew Strike: Spin in the air once, using the rear boost to launch yourself high into the sky, then spin downwards several times before slamming down on the enemy.

Selli is a smart female robot train with a pink and white paint job and yellow accents around her eyes and on her roof, where she also wears heart-shaped glasses with yellow lenses and pink frames, and her eyes are a deep turquoise. Becky is a small robot train similar to Selli and also female, acting as her assistant; she can emit a scanning beam to detect track or portal malfunctions, but she does not speak, only repeating her own name.
She's a systems whiz and seems to have a wealth of knowledge about inventions and mechanisms. Despite her cute and adorable pink design, she's a techie. Her lack of romantic feelings is an added bonus. For example, she mistakes passionate advances for a system error. She trusts Duke and, unlike the other trains, doesn't harbor any animosity or fear toward him. There's something of a mad scientist about her. When she trains Kay, Alf, and Ducky in virtual space, she replies that it's okay because she's already tried it on Kay when Alf asks if she's sure it's safe. It's a highly suspicious statement to say she used a colleague as a test subject. In other words, Kay could have met a terrible fate... She also smiles slyly when she sees the three trains floundering in virtual space. In the episode where she goes to rescue Victor, she warns Alpha, who doesn't trust Duke, who came with them, to wake up. She is very fond of her assistant, Becky. When Becky runs away from the virus, she breaks into the house and tries to save her. Due to Alpha's intervention, she is forced to retreat. Afterward, Becky brings Duke, who was sealed away, and the trains, which were about to derail, manage to stop the virus.

Gravity Nanobomb: Sally's technique. A technique in which a spherical nanobomb of considerable weight explodes upon impact with an enemy. In the series, this technique was primarily used to defeat the Viral Dukes.
Nano Trap: Becky's Ability 1. A technique related to Ducky's waterjet cutter. After creating multiple nanotraps using communication abilities, this ability connects the nanotraps with lasers, allowing them to immobilize enemies or prevent them from approaching.
Scanning Beam: Becky 2's technology. This is the ability to analyze and determine the enemy's condition by approaching them and directing a beam of green light from their eyes.

Duckling is the shortest of the robot trains, yellow and red in color, with a mouth designed to resemble a real duck's bill. He is an amphibious train, capable of traveling on both rails and water, and his equipment includes a water gun and a water cutter with a limited water supply. He is Kei's best friend, and when Kei is injured, he is the one who suffers the most. He plays a comedic role, and the local trainees treat him like a friend. Furthermore, as the name suggests, unlike other trains, this train's mouth is shaped like a real duck. This is a unique concept for an amphibious train, utilizing water-related technology. Judging by Duke's reference to "a guy who is neither a ship nor a train," the classification between amphibians and robot trains is quite ambiguous.
Water cannon: A technique that sprays a large amount of water and delivers a powerful blast of water with tremendous pressure.
Waterjet cutting: A technology that minimizes the opening through which water exits and cuts the material with a powerful jet of water. By combining this technology with a Selly nanobullet, you can create a laser trap called a "nanotrap."
Water Bomb: A technique where water is shot out in a sphere and explodes.

ALF is a red-and-white robot train that serves as a mechanic and rock-climbing rescuer. He has emerald-green eyes against a dark screen, red hair with a yellow fringe, and red feet with yellow and white stripes. His equipment includes webbing ropes, metal boots, and a backpack-like device from which he can release a net. Unlike the impulsive and hasty K, ALF is cautious and responsible in everything he does. However, he was K's best friend before his memory loss. ALF blames himself for the fact that if he had participated in the opening instead of Duke, K would not have lost his memory, and Train World would not have been demoted.
He repairs broken equipment, replaces rusty rails, repairs damaged trains, and so on. He has a talent for mechanics. Not only is he physically strong, but he also has excellent interpersonal skills, which earns him the affection of almost all the trains. He usually maintains a reserved demeanor, but in critical situations, he calmly assesses the situation and gives orders, making him a typical leader.
When it comes to trust, it's clear he's an emotional thinker. When the tunnel was blocked due to Duke's betrayal, he distrusted Kay and blamed him for his stubbornness. Gradually, they grew closer and became friends again, and even after Duke was cured of the virus, he seemed to ignore them. In response, I heard Selli say she didn't believe I could cure Duke. Misunderstandings were then resolved during the process of rescuing Victor and fighting the virus.
He secretly likes Selly. Selly doesn't really care, but...

Rope Launch: A technique where a rope is launched from within when a white button is opened. Alp's primary attack technique. The rope has a shape similar to the other two forms, and one side is used to pull the opponent in and attack them.
Search Device: A device that extends from the rear of the United. It was used to search for K, who was buried in the rock.
Drill: A device attached to the front of a handheld unit, used primarily for repairs, but also for breaking rocks or defeating enemies. It's quite powerful.
Thrower: A technique in which the ends of the handle are grabbed and thrown at an opponent or a rolling stone. The force of the throw is quite great.

Jeffrey—besides his dark green and yellow coloring and tall stature, he has several distinctive features. On his head is a megaphone-like structure, and where his nose should be, he has a yellow "whisker" that is actually part of his faceplate or grille. A warning light is located on his chest. Jeffrey carries a film camera, and his body is literally "stuffed" with training videos, leading ALF to call him a "running museum."
He uses the ability to stop the target's movement, while using this technique he shouts "Stop!" and "Action!"

Victor is a military train robot specializing in clearing snow from tracks. His body is dark blue with red and yellow accents, and his eyes glow blue against the dark faceplate. His mouth is replaced by a red rotating hemisphere, and his nose is fan-shaped, reminiscent of a snowplow. Victor has a lamp attached to his head, similar to the one on Duckling, and his feet have attachments reminiscent of skis. His body also features elements such as a propeller and cutters, and a pipe can be seen on his back, completing his appearance as a powerful and imposing machine.

He was a former instructor training gatekeepers. Most of the gatekeepers in his area, Victor, are in a similar position to himself, especially because the military treats them harshly. At the same time, he has good relationships with most of the trains. Thanks to the aforementioned discipline, the trains rely on and respect Victor.
In the second episode, when Duke, infected with the virus, goes berserk, we see he's quite experienced. Duke stops Selley from telling him they need to call Victor or that "if Victor comes, there'll be trouble," after he prevents Selley from contacting him.
It's clear that the pure engine power is the same as K's. Most battles are fought using brute force.

Ato - Unit Launcher: Equipped with a weapon block resembling a carving knife, a rear block, and skis.
Blockade: assault on an establishment with the use of a weapon.
Edge Spin: Performs a powerful spinning kick.
Fan Blast: Creates a powerful blast of air from a fan directed at the enemy.

Duke is a large, black and gray train (some sources describe him as an armored train, while others say his locomotive resembles a high-speed train) with a very durable and powerful body. Some parts of his locomotive (on the sides and roof) are painted gold, as if reminding the viewer that the robot train's name translates as "Duke" and that, based on its characteristics, he is one of the best trains. He has gray eyes. Duke's leg design: His thighs are long, narrow, almost entirely black mechanical sections. His knees are massive, light gray squares, resembling protective pads. His shins are wide, dark panels with geometric light details at the bottom. His feet are angular, with protruding parts of the body, rather than the usual flat robotic soles. The rear end is a pair of wheels, which, judging by the frame, remain visible even in robot form. Arm Construction: Shoulder Section. The arms are attached to the body via massive, angular joints. They don't look like normal human shoulders with rounded joints, but rather like mechanical hinges covered by armor plates. Main Arm Sections. Dark, rectangular mechanical parts are visible between the shoulder and the outer block. They form a fairly massive structure, yet the arm can bend and change position. Light Panels. On the outer side of one of the blocks, a light-gray rectangular overlay with several longitudinal stripes is clearly visible. It contrasts with the black body and emphasizes the angular shape of the part. Mechanical Connections. Smaller elements are visible between the large blocks, connecting them to the arms. These elements make the arms look like assembled mechanisms rather than solid metal tubes.

Duke is a large black train with a very shy personality. He enjoys spending time in dark areas and protecting the city's inhabitants. Duke is a kind and calm robotic train who tries to avoid socializing and dislikes working with others; he always spoke kindly and never hated anyone. After Kay cured him of the virus, Duke became a loyal best friend to Kay. When he laughs and speaks, his movements are subtle. He is usually taciturn, and even when he does speak, he does so abruptly, never engaging in idle conversation. He also says he doesn't like meeting other trains. However, Duke knows a lot about trains and is aware of phenomena that Geoffrey is unaware of. In short, he is an aloof individual. He rides a board called a "Deltaboard," and he performs excellent tricks with it. He shows a tsundere side to himself: he's prickly in appearance and couldn't get along with the trains around him, but he helped out when needed and also showed himself to be a responsible person (or more accurately, a robot train).
Duke has a soft, rhythmic, emotional, and stern voice. He rarely shouts, but tries to speak calmly and reservedly.

Energy Absorption: Amplifies the arm's booster energy and creates an energy field to draw objects into it. This technology has impressive performance. They initially attempted to use this technique to depower four people.
Lightning Strike: An enhanced energy absorption function. It was shown as a production that gathered energy and then launched an energy sphere into the sky to absorb it.
Electric Night: One of Duke's signature techniques, he attacks by releasing waves or energy charges resembling an electromagnetic pulse using the amplifiers in his hands. In some animations, this attack closely resembles the Lightning Bomb.
Chain Lightning: A technique similar to "Electric Bomb." It releases a wave that encases the target in an energy sphere, restricting their movement and inflicting continuous damage. When using this technique, energy spheres also form in the wrist accelerator and on the arm, and the Chain Lightning spheres can be manipulated similar to psychokinesis.
Night Lightning: One of Duke's signature skills, it attacks the enemy by releasing a combined wave of two energy spheres generated by the manipulator's nozzle.
Organ Shock: A striking technique that accumulates energy in the hand and directs it at the opponent. This is practically Duke's ultimate technique. As the name suggests, this technique strikes a train engine.
Lightning Cannon: He charges up energy using all four nozzles of his arm enhancers on both sides and delivers a single blow. Judging by the description, this move is more suited to Duke than the "Mechanical Smash," but it has only been used once.
Electric shock: Collects energy in his hands and transfers it to another. This method was used to recharge a train that had run out of power.
Double Lightning Chain: It increases the power of the arm amplifier, shoots a red beam, rotates and rushes.

This is Duke's skateboard-shaped weapon and support mechanoid, deployed from the Ato Delta's final large cargo bay, which Duke uses to travel and assist in combat. Its capabilities are described as significantly superior to the intelligence and combat prowess of the Ato, which serves as a support mechanoid in the same position. It appears even when Duke simply shouts "Delta Board!" without any specific instructions, and assists in combat at its own discretion, demonstrating incredible effectiveness. It can even fly, has excellent traction, and Duke uses it as a shield.
The board is elongated, with ends bent upwards, and the wheel mechanisms are located below.