Adler does not sleep for more than 3–4 hours, because he treats sleep as a waste of time. When he cannot fall asleep, he smokes cigarette after cigarette and writes notes from missions that no one else can decipher;
He has an obsession with control. It's not just about missions. Adler needs to know where every object in his house is, who knows his phone number, who has his address. Chaos irritates him because it reminds him of the years when he dealt with Stitch himself;
He suffers from flashbacks — sometimes Adler confuses the present with the past. He can, in the middle of a conversation, momentarily 'drift away' as if he had returned to the interrogation;
He has a strange kind of trust in Park — not flirting, not friendship, but something in between. She can read his mood with just one glance;
Towards Bell, Adler feels a mixture of guilt and curiosity. Part of him would like to fix everything, while another part — cannot stop thinking about how far the boundaries of loyalty can be pushed;
He has a relationship with Mason based on mutual respect and irritation. Both too similar to like each other, but too competent not to respect each other;
Adler smokes only one brand of cigarettes (old American, unfiltered), not because he likes them, but because it is the only thing whose taste the war has not changed;
He never talks about his wounds — Adler treats all scars like a map that only he knows;
Adler collects lighters — they come from different countries, but none is used. Each symbolizes a mission that he do not regret... or regret the most;
He loves classic jazz and instrumental music, especially Miles Davis. He says that 'music without words lies less';
His mental state is deteriorating more and more — because at some point he starts to wonder if his memories of Bell, Perseus, and the others are really his own:
Coffee is his religion. Adler doesn't talk to anyone before his first cup. Park once tried it and only got "...come back in 10 minutes.";
He always carries a supply of chewing gum with him, but he never chews it, he gives it to others so they 'don't talk with an empty mouth.';
Adler has an impeccably clean desk, so anyone who tries to touch or move anything even a millimeter is immediately silenced by a death glare;
Adler can't stand computers; if something freezes, he hits the keyboard as if he were interrogating it;
He is obsessed with shoes. Russell can recognize a person by the sound of their footsteps. If someone has their shoelaces tied incorrectly, he won't say anything, but he will suffer internally;
He has 'look number 7' — that's what Park calls his expression when he's planning something he shouldn't. At times like that, it's better not to ask what he's up to;
Sarcasm is his second language. When someone asks, "Is it safe?", he replies, "For me? Yes.";
He gets along surprisingly well with Woods, as long as their conversations are about killing, music, or whiskey. When the topic turns to feelings, Adler immediately changes the subject;
Once he said to Mason, "I'm not your therapist." Mason replied, "That's good, because you would have shot me." Adler said, "No, I would have just sent you the bill.";
Adler believes that 'team bonding' is a concept for the weak — however, if someone on the team is in the hospital, he always leaves them a cigarette and a note saying 'come back before they give me a new partner.';
He lights not only cigarettes but also explosives, candles, and... gas stoves with a lighter. He believes that a lighter should "live.";
Russell does everything his own way. If the procedure says, "Enter from the front," he goes in through the ceiling;
He always leaves behind mission notes in the form of dry reports, but sometimes he adds sarcastic comments in the margins like "Marcus almost died because he can't run straight.";
He doesn't celebrate birthdays. But he remembers all the dates of his missions — even those that ended badly;
His apartment is absurdly tidy, but he has one room that he never shows. Apparently, he keeps all his mission memorabilia there – from Soviet badges to a destroyed helmet from Vietnam;
When Adler truly laughs, it sounds so rare and rough that people think he is choking;
