Tommy's head and upper torso are composed of the locomotive of a steam-powered train, with his large, cartoonish face being located on the smokebox. On his bottom half, he wears a bodysuit with gloves, boots, and a decorative belt.
- Increased Speed: Due to his Quirk making his upper half composed of steam-powered machinery, Tommy can run at very fast speeds. He was able to keep up with Koichi Haimawari, who was able to move up to speeds comparable to a speeding bus.
- Tommy's given name and appearance is a reference to Thomas the Tank Engine, while his surname and the number 4 on his sides is a reference to the Thomas & Friends character, Gordon.
- My Hero Academia: Vigilantes Manga: Chapter 94.5.
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