I don't know what they put in him. I played the game blind and I ADORE him just like three quarters of the player base and ended up putting a photo of his portrait in my wallet like weebs do with their waifus.
I don't really have anything coherent to say...
I love that he seems to be the moral compass but isn't always right, I love that he both wants to appear normal and professional while driving a loud-ass motorcarriage and wearing a bright orange revolutionary airman bomber. he desperately wants to look cool. he defends you at the end even if you're a massive fascist. he's a nerd. he doesn't mind helping Evrart intimidate a guy if it helps the investigation. he's so so kind and patient with you. he clings to the little power the RCM gives him and uses it to threaten a racist guy. he flashes smiles only you can see. he has a complex relationship with his half-seolite side. he cares so much but he's also out of fucks to give. he's resigned to the current reality and can only really believe in the RCM, despite the flaws he does see.
he's mega repressed and full of contradictions and I just... .......... ...........

reminder: he looks like this!!!!!!!!!!!!!!!!!!!!! every time someone draws him with with a good hairline and a sharp chin an angel loses their wings </3

most people I've seen draw his apartment do a super neat minimalist tastefully-decorated place. IMHO it's far from the truth. not only because his surname is an homage to Misato Katsuragi (super professional with a disaster apartment (she also recklessly drives a blue car)), but because he loves cool machines and tabletop games, and he sews. his pockets are full of stuff, I refuse to believe his place isn't also full of nerdy things, cool doodas, and incomplete projects. plus, the RCM pay is low so I bet it's also small which doesn't help.

does kim kitsuragi is commie?
hold on I'm not crazy! some suspicious behaviours:

• he, the guy who's terrified of looking like an idiot, cosplays a commie pilot AT WORK because he admires them.
  (the RCM likely comes from the ICM, maybe that's one of the reasons why he joined, deep down?)
• he calls for an Ace's High, which "still holds revolutionary connotations" in Revachol
• "diamond" glasses makes zero sense and they're actually diamat glasses, probably (dialectical materialism, like Khan's in Sacred and Terrible Air)
• SUGGESTION - He still refuses to believe you subscribe to Mazovian socio-economics, but entertaining the thought has given him some measure of solace.
  ESPRIT DE CORPS - Camaraderie even. For a second there he feels less alone -- but then the second passes.
  *

  (there's a problem with this one, people asked Kurvitz about the political vision quests and he said they're rushed, that the moralist and communist one contain things that would have been removed if they could have checked.... who knows)

I think all of this fits into him wishing for a better future (which means communism because the main writers are communists) but having resigned because it looks impossible.
I wonder if this would have been explored in the sequel...
(and well he's the Ignus "Warcrimes" Nilsen / "Not Enough War Crimes" Ulixes of the Mazov/Nilsen dualship thing these six seem to have so he should have some thoughts... and some desire for violence like those two. if any of this was intentional)
(someone, I forgot who, pointed out that his jacket is the exact opposite color of moralist blue...)

but also, I've read this tumblr post and, besides agreeing with everything, I wonder if Revachol likes her revolutionaries not because they're communists but out of nationalist pride, linking them more freedom and independendence from the Coalition Revachol than to Mazov. maybe this is the reason why *gestures towards the list*

fun fact: Kim was a popular name in early USSR because it was the acronym of Коммунистический Интернационал Молодежи (Young Communist International).
sadly this is just a fun fact because Kurvitz has said they didn't choose this name for this reason :(

things we know he carries around because I find it funny. what else dose he have I need to know

• Wallet
• Keys to his Kineema
• Three Handkerchiefs
• One daily cigarette*
• Small folding knife
• One pair of latex gloves*
• Black evidence bags
• Gun
• Notebook with two big pens
• Instant colour camera with two glass ampoules

"Take what you need, officer. It's going to be a long case. I'm not *protective* of my tools. Like some men are..." he lies like a liar and then freezes when you ask him for one of his pens to do your job
*maybe more and he just doesn't want to share

"Honestly, we're surprised people like him so much," says lead writer Robert Kurvitz. "Of course, we always adored him. All these years playing the game, testing it, writing it. We got to spend a lot of time with Kim. And we always felt he's a real person and our friend."

[...]

"I like to think Kim has a Thought Cabinet project called Revolutionary Aerostatic Brigades that he's worked on since he was a teenager," Kurvitz says. "This raises the learning caps for his Reaction Speed and Interfacing."

[...]

Kurvitz stresses that Kim doesn't actually have a character sheet hidden in Disco Elysium's code. Imagining that Lieutenant Kitsuragi has only one natural attribute point in Motorics helps the ZA/UM team to understand the depth of his character beyond what's referenced in the game's dialogue. "We just came up with this stuff for coherency," says Kurvitz. "And because we're nerds."

[...]

Kim's high Volition skill makes him impervious to prying, Kurvitz says, as the detective can find out on occasions being met with Kim's brick-wall resolve. Kim often chastises these whims of the detective's, but will occasionally play along. The Lieutenant finds his new partner funny, says Kurvitz.

[...]

"You're in this awful mess and literally nothing and no one is on your side—except Kim Kitsuragi," says Kurvitz. "It just so happens that he's great. A great detective and a great human being."

- PC Gamer interview