Anti-Hero: A firm Nominal Hero. If 47's targets weren't all evil, and if it wasn't for his handful of Morality Pets, 47 would have no heroic features at all. But in Hitman 2 and Absolution he become a type 4
Character Development: Absolution is the first time in-story where 47's motivations are altruistic. He still gets paid for his altruism, though.
Apart from Hitman 2, where his goal is to save Father Vittorio, though he goes back to a life of contract killing when he realises that he can't find peace.
Badass in a Nice Suit: One of the first things 47 ever saw of the world outside the asylum was a store that sold expensive business-suits. Needless to say, it influenced his taste in clothes quite a bit. He's rarely seen without his suit.
Combat Pragmatist: Willing and able to use pretty much anything in a fight, from marble busts and bricks to pianos and electrified fences. His unarmed combat style is best described as "brutally efficient", as expected of a combination of Krav Maga, Jiu-Jitsu and Escrima.
Even Evil Has Standards: When he learns of what happened to Victoria in Absolution he states "I can no longer be a part of this." and from then he goes to great lengths to protect her.
Guns Akimbo: The Silverballers. Of course, if the game is played right 47 almost never actually uses them.
Had Five Fathers and Self-Made Orphan: Strictly non-romantic example, as he was cloned using the genetic material of five different men who formulated the whole project and left to Ort-Meyer to make. He is then fooled by one of his fathers to kill the other four so he wouldn't have to share the fruits of his work and 47 then kills him in revenge.
Hitman with a Heart: A characteristic of 47 is a reluctance to kill or abandon certain innocents but, once the trigger is pulled, a total absence of remorse afterwards. He claims that it leaves another body to hide and also calls it unprofessional.
Holy Hitman: Following Codename 47, he found God and shed his world possessions. His salary from that game was donated entirely to the Catholic church.
Not Good with People: Animals, especially small ones, such as birds and rabbits, seems to be one of the only things 47 display any true fondness towards. But just as with anything else in his life, he will kill any pet he has in his possession without hesitation (although in these cases not without regret), if they pose a liability to him.
The Stoic: 47 is very unflappable. Even when he's wounded.
Not So Stoic: However; Diana's betrayal in Blood Money makes him visibly angry, to the point where he shouts "Bitch!" at her, which marks the only time he ever has been verbally aggressive on-screen. He also clearly expresses regret when he kills his pet canary because of a false alarm.
Made even more apparent in the cutscene before Terminus, when contemplating what the ICA did to Victoria, he flat out states, "I can no longer be part of this." To those who've played all the games, it's almost a Wham Line.
When The Saints track him to his motel and blast his room with an RPG,his eyes widen.
Themed Aliases: Many of the aliases he takes on (Tobias Rieper, Metzger, Krupps) are death related.
Unusual Eyebrows: Not unusual on their own, but 47's large, jet black eyebrows stick out on 47's otherwise pale, hairless head.
Welcome Back, Traitor: After spending most of Absolution as a rogue agent, it's implied in Diana's letter that 47 will be welcomed back into the Agency now that he's helped to expose Travis' corruption.
Even Evil Has Standards: She may be cold, professional and heartless to most people, but in Absolution she's genuinely horrified by the experiments conducted on the 14 year old Victoria, and she's willing to risk everything in taking Victoria away from the ICA to give her a future other than that of an assassin.
Sudden Principled Stand: In Absolution, she doesn't approve of the direction Benjamin Travis is taking the ICA, and is horrified by the treatment of Victoria. She alludes to this after 47 shoots her, saying: "We used to have honour".
Made of Iron: He's easily the toughest enemy in Silent Assassin, capable of withstanding a few dozen 9mm rounds to the chest before falling. He still goes down instantly to a headshot or assault rifle fire, though.
Big Bad: The closest thing that Contracts has to one.
Non-Action Big Bad: He goes down as easily as any beat cop, in fact the goal is to take him out without a fight since he's surrounded by SWAT. This is notable because the series usually has the Big Bad be a lot tougher than the basic Mooks if you try to take them in a straight fight.
Evil Counterpart: He works for The Franchise, which plants him firmly in evil territory, no matter the position you feel 47 himself takes.
"Hero" of Another Story: You constantly see reports of his own exploits running parallel to 47's in the newspaper articles in Blood Money. A conversation between a nurse and a doctor in the Flatline mission also implies he was recently involved in a mission at the rehab clinic 47 was currently at.
Made of Iron: Although not as tough as the super villains from the earlier games, he's still the hardiest enemy in Blood Money. He can take about 10-12 standard pistol shots to the chest before falling, compared to only a couple shots for everybody else.
Authority Equals Asskicking: Although he doesn't really show any aspects of this in the cutscenes, during the final fight with him he's got a great gun and can take noticeably more damage than regular Mooks, although not as much as some of the super villains from the earlier games in the series.
Properly Paranoid: Travis is initially portrayed as insanely paranoid for having his men seize control of a public cemetary and dig up Diana Burnwood's corpse just to make sure that she's really dead; even his aide goes so far as to openly ridicule him for it. However, the final scene reveals that Diana is somehow still alive.
Revealing Coverup: His attempts to prevent the less radical elements of the ICA from learning about Victoria- coupled with the measures taken to ensure that Diana really is dead- ultimately start drawing attention from them, especially once they cause 47 to go rogue. By the final level, Jade warns Travis that Agency higher-ups are starting to ask questions.
Morality Pet: For both Diana and 47. Both are willing to go rogue from the Agency to give her a chance for a life other than that of an assassin. Diana acts as something of a Parental Substitute for her while 47 acts as a Papa Wolf.
Tykebomb: Like 47, she is genetically engineered to be physically superior than most humans and was destined to become an assassin by Travis. However, she's dependent on an isotope contained in a necklace and becomes physically weakened if it's removed.
Chronic Backstabbing Disorder: Gives 47 information he needs before selling him out to Dexter and the ICA. When Dexter humiliates him, he sells him out to 47.
Karma Houdini: During the game he sells out anybody as long as theirs a reward or his life is threatened, 47 included. He survives the game and is last seen in The Stinger offering the police of Chicago information about 47.
Psycho for Hire: Drives a hard bargain for his services, but enjoys mass murder and torture waaaay too much to be a Punch Clock Villain. Watching him prance around laughing after Lenny shoots Sister Mary should remove all lingering doubt.
Super Soldier: He was genetically augmented by Dexter Industries as a child for enhanced strength. However, the resulting gigantism was an unintended side-effect that made him entirely unsuitable as a supersoldier (it's impossible for him to blend in a crowd, and in a straight firefight he's a huge target), so Dexter just keeps him around as a bodyguard.
Unskilled, but Strong: Seems to embody this trope, but when you're 7'6" and 440lb, you can sort of getaway with it. However, if you masquerade as The Patriot and fight him in Fight Night, it becomes pretty clear that against an expert hand-to-hand combatant, his strength doesn't count for much.
The Worf Effect: His role in Absolution seems partly to show how massively strong he is by incapacitating 47 in Terminus, then showcasing just how badass 47 is later on when he fights him one-on-one and curb stomps him. Alternatively, you can just drop the lighting gantry on him.
Bling Bling Bang: Her personal weapon is a golden SIG Sauer P226 with wood grips.
Mushroom Samba: One of the many ways to kill her is to poison her sushi, resulting in hallucinogenic side-effects as the toxin takes effect; long story short, Layla jumps from a balcony while giggling at visions of ladybugs flying above her head.
Only Sane Woman: Unlike Dexter she realizes how stupid it is to murder a maid, blame an unconscious 47 for it and setting a whole hotel on fire instead of just killing him.
Trophy Girlfriend: As Dexter sums it up: “Your job is to shut up, do what I say and look good”.
The Vamp: If confronted in the panic room a cut scene plays in which she tries to seduce 47. Then she pulls out a gun and tries to to shoot him.