Halloween Costume Guide
Nine items built around one very specific haircut. The British assassin with a Thomas the Tank Engine worldview, and the bleached hair that makes the whole thing click.
Lemon guards a briefcase on a bullet train from Tokyo to Kyoto and reads everyone around him using Thomas the Tank Engine characters as his framework. The frosted hair is the whole costume. Most people who saw Bullet Train (2022) will recognize it. Those who didn’t will see a very specific person and ask questions.
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The hair is what people read first, and it has to be sorted before you put on anything else. If the frosted hair is off or shifting by the time you arrive, the denim jacket and tie read as a vaguely stylish outfit with no clear reference. With the hair right, the whole thing clicks. The jacket shoulder fit is the second check: if it’s sitting too wide, the costume looks borrowed rather than worn.
Lemon is not excitable. He notices things quietly and files them away. At a party, this means you don’t explain the costume to people who don’t get it. You look at them, assess them, and eventually tell them which Thomas the Tank Engine character they are. Delivered with the right amount of sincerity, this is either the best conversation you have all night or the weirdest, and for Lemon, both outcomes would be fine.
Hair Hat vs. Spray: Pick One and Commit
Using both is not an option, and switching at the party is not realistic. If your hair is short and has natural texture, the spray gives a more natural result in photos. If it’s longer or you want more visual volume, the hat is more reliable. Either way, fix it before you leave and do not touch it again until you’re home.
The Tie Needs to Be Loose
A tight, properly knotted tie with a denim jacket looks like you forgot to change after a work event. Lemon wears his loosened, with the top button undone. Knot it, then pull it down two inches. That’s the specific look. A tie cinched to the collar here reads wrong immediately.
The Kyoto Express Assassins
This is the strongest option if your group has all seen the film. The four main players on the train have visually different looks, so no one ends up wearing the same costume. It reads clearly to anyone who knows Bullet Train and it’s a natural conversation starter for anyone who doesn’t. The weak point is Ladybug: Brad Pitt’s character is recognizable, but the costume is basically a blue tracksuit, which is either funny or underwhelming depending on how committed the person wearing it is.
Suited Hitmen
This is a conditional group because it only works if everyone commits to a clean build. Jules and Vincent are very widely recognized, John Wick is even more so, and Lemon is the niche pick of the four. The concept is solid because it does not need explanation once you see all four together. I would not put Lemon in this group unless the person wearing it is willing to keep the hair right all night, since without it they just look like a fifth person in a suit.
The Henry Portrayals โ Same Actor
This only works at a party full of people who follow Brian Tyree Henry specifically. Phastos from Eternals and Paper Boi from Atlanta are the two that land broadly. Bernie Hayes from Godzilla vs. Kong and Detective Mike Church from Child’s Play are for people who have watched a lot of things and remember who was in them. Honestly, half the room will not connect the thread without you explaining it. If you’re okay with explaining, do it. If you want the concept to land on its own, it won’t.
The Lemons โ Same Name
This is a niche group concept that works entirely on the joke of shared names across unrelated franchises. Liz Lemon from 30 Rock is broadly recognized. Lemon Breeland from Hart of Dixie is not. Earl of Lemongrab from Adventure Time is beloved by a specific audience. The concept needs a group that commits to the bit visually and doesn’t mind explaining it to most people they meet. If your group enjoys that kind of interaction, it’s a fun one. If not, it will get tiring fast.
Thomas and Friends Fanatics โ Niche
This is a very niche concept and it should be treated as such. It only makes sense if you know the film, which means the audience needs to know the film too. Sir Topham Hatt as a costume is just a man in a top hat and suit, which is a reasonable build. Mr. Conductor from Shining Time Station is recognizable to a certain generation. Thomas the Tank Engine is obviously recognizable but that costume is a commitment and not always flattering. This group is genuinely funny to the right people and invisible to everyone else.
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The hair solution, denim jacket, and patterned tie are the three things you need to find specifically. Everything else has a good chance of already being in your wardrobe. Check the jeans and loafers first before buying.
A small Thomas the Tank Engine figure is not in the item list, but it’s worth considering if you’re going to a party where people have seen the film. Lemon’s whole system is reading people as Thomas characters. Having the figure gives you something to do with your hands and a built-in bit. At a loud party where you’d otherwise need to explain the costume, pulling out a small Thomas figure and silently evaluating someone is funnier than any explanation you could give. Skip it if the crowd hasn’t seen Bullet Train. With the right crowd, it’s the best prop you’re not buying from the list.
Nine items: a lemon-tinted lens, a frosted hair hat or blonde cover-up spray, hoop earrings, a white dress shirt, a raw denim jacket, a plaid skinny tie, slim denim jeans, and black leather loafers. The frosted hair and the denim jacket are the two essential pieces. Without the hair, everything else just looks like a casual outfit.
His most quoted line is: “Everyone’s a Thomas character, you just gotta figure out which one.” He also says, at a key moment: “I told you I was gonna be fine.” The Thomas line is the one most people remember and the one worth delivering at a party if the timing is right. Say it to someone you’ve been watching for a few minutes, then tell them which Thomas character they are. Do not explain why.
Bullet Train was a solid hit in 2022 but it is not a film that has stayed in heavy rotation since then. People who saw it will recognize Lemon right away, particularly the hair. People who didn’t will see an interesting costume and ask questions. This is not a “everyone will get it” costume. It works best at a party where you know the crowd has broad taste in film.
Yes. Without it, the denim jacket and tie combination has no clear character identity. The frosted hair is the one feature that separates Lemon from any other person in a casual jacket. Do not skip it and expect the costume to read.
Both options in the item list exist for this reason. The spray works better on shorter hair with natural texture. The hat is the more reliable option if your hair is longer or significantly darker. Test the spray on a small section the day before to see how it reads on your specific hair before committing to it for the whole night.
Lemon uses Thomas the Tank Engine as his system for understanding people. He assigns a character to everyone he meets and takes it seriously. For the costume, a small Thomas figure is optional but it is the prop that signals you actually watched the film rather than just looked up the costume. It also gives you a reliable bit for the whole night with almost no effort required.
Lemon is one half of a British assassin duo in Bullet Train (2022), played by Brian Tyree Henry. He and his partner Tangerine are assigned to guard a briefcase on a high-speed train from Tokyo to Kyoto. Lemon is the more observant of the two, with an unusual habit of categorizing everyone he meets as a Thomas the Tank Engine character. The film is based on the Japanese novel Maria Beetle by Kotaro Isaka.