A while back on reddit someone was wondering why Seven is the only Shadow Killer to, and I quote, "give a fuck" about the uniform and here's an answer that makes sense after episode 9:
He didn't.
The definition of a uniform is "the distinctive clothing worn by members of the same organization" which doesn't apply to Seven's shadow killer fit, since he's the only one who wears it. Every other shadow killer's clothing is unique to them, reflecting their personalities (Redtooth is wearing a shredded heaven lily uniform from 10 years ago for fuck's sake) I don't think any of their outfits even incorporate the shadow killer insignia anywhere. They don't match and they aren't trying to. From a character design perspective, their clothes aren't meant to communicate that they are shadow killers, they're meant to reflect their characterization.
Seven's clothes communicate only that he is a shadow killer. There is no personality there. You could snatch this outfit off him, give it to a background Xuanwu assassin, and not only would I not look twice at it, it would actually be kind of plain compared to some of the background assassins in the show. The only distinguishing thing about it is the knowledge that it belongs to Seven and the massive insignia on the back. Purple is also the color used in association with the Shadow Killers in general
It isn't a uniform, but it sure gives off the impression of one, doesn't it?
We are shown Xuanwu killers who wear a uniform, specifically the ones that invade greencloud, but either the rules are different from what they were 20 years ago or the uniform is optional, because certainly no killer from the present bothers with it.
You know which named character did wear it though? The Leader
Honestly, if the uniform was optional back then, I fully believe the Leader would have worn it. This is the guy who made his robot report changes in the shadow killers' reputation to him. The guy who immediately sicced a league of assassins on a tiny island as a power move after one of its residents damaged public opinion of the shadow killers. The guy who, as a plan to get rid of one of his biggest threats, ordered the emissary to spread a rumor (because that's apparently something she can do???) and has straight up said all assassins use roundabout ways to win. The Leader CARES about image and reputation. It's one of the few things we know about him as a character. He would want the shadow killer insignia plastered all over their atrocities, so people know who to fear.
Now back to Seven for a bit.
The earliest we see of Seven post-amnesia (and conscious) is in s2e2, the one where Dai Bo tricks him into trying to steal a diamond. Literally his first line of dialogue is complaining about the clothes he was found in. He says they're too extra, and asks if there's anything else he can wear, and when he's told no, he just gives up changing and stays in the clothes he was already wearing. The very earliest opinion we hear from him, and it's that he doesn't fucking like these clothes.
Another thing I gathered from this episode: Seven can't dress himself.
Before he found his signature outfit, this is what he wore. This is what he used to leave the house in. Nothing I say here could express that tragedy better than just looking at it.
And it's not like his normal outfit is great either. To quote the creator of S7: "Seven's top is a pullover that is usually worn during winter while his bottom consists of a bermudas that's usually worn during summer. His shoes are a pair of black canvas shoes which are commonly seen on Chinese uncles. This is a very unreasonable combination but yet it is able to reflect the nonsensical nature of Seven's character." This is a fascinating quote in general, but the part that's relevant is that Seven wears some bullshit. And you know what's funny?
Seven canonically has 12 pairs of this exact same fit
This guy found ONE outfit he liked and filled his wardrobe with copies of it and seemingly nothing else so he never has to think about what to wear. Because that's totally a normal thing people do.
And you know what's even funnier? The hoodie is kind of an inverse to his shadow killer clothes. One practically has "shadow killer" printed all over it but tells you nothing else about its owner, while the only decoration on the other is Seven's name. It is the most plain, boring outfit ever, but it is undeniably Seven's.
Oh and there's one more named character who wears the shadow killer insignia
Just, you know, the guy explicitly stated to be Seven's replacement.
So, Seven hates the clothes he spent 4 years in. He has trouble choosing his own clothes. His Shadow Killer outfit matches the Shadow Killer headquarters and the robot specially made to serve the Leader. The only shadow killer who dresses like him was also made to serve the Leader.
In conclusion: until the age of 19, Seven did not choose his own clothes.









