Cheshire- Arkhamverse (Batman Arkham Origins)

First Appearance: Batman Arkham Origins (2013)

Cheshire is an assassin, who was contemplated to take part in “Black Mask”'s one night deal to kill the Batman on Christmas Eve.

“Black Mask” had a file on her along with several other assassins, but decided that the eight assassins he had hired were either the most qualified or suitable for the job, rejecting her.

Batman discovers her file in the Sionis Steel Mill office along with David Cain and Black Spider.

Protocol 11- Arkhamverse (Batman Arkham City)

 First Appearance: Batman Arkham City (2011)

Protocol 11 is a a fail safe that Hugo Strange built into Wonder Tower in the case of the tower being compromised and his plans failing. On the night of Protocol 10, Hugo Strange uses his last breath to trigger the explosive in the tower and kill both Batman and Ra's in the blast.

After Batman compromises Wonder Tower and Oracle shuts down Protocol 10, Ra's al Ghul arrives and stabs Hugo Strange through the chest. He tries to plead with Ra's that he just needs more time to defeat Batman, but Ra's tells him that he failed to see his “vision” through. Ra's turns away from both Batman and a dying Strange to bask in the destruction. Batman snarls that he will stop him, but Ra's merely laughs and says that he doubts it. In his last breath he remotely commands the tower with voice activation to activate Protocol 11, using the password “Wayne.”

Oracle warns Batman to get out of the tower and grabbing Ra's, dives from the tower as a five second countdown begins and the whole tower explodes.

David Cain- Arkhamverse (Batman Arkham Origins)

First Appearance: Batman Arkham Origins (2013)

David Cain is an assassin who has connections with Shiva.

He was considered by Joker to take part in the one night only challenge to kill the Batman on Christmas Eve, however was rejected along with Cheshire and Black Spider.

Batman finds his file along with Cheshire and Spider in the office of the Sionis Steel Mill.

Black Spider- Arkhamverse (Batman Arkham Origins)

First Appeared: Batman: Assault on Arkham (2014)

Eric Needham is a famous and dangerous assassin for hire.

Joker considered hiring him to kill Batman on Christmas Eve along with the other eight assassins, however decided against it and rejected him along with David Cain and Cheshire.

Joker had a file on Spider, which he left in the Sionis Steel Mill office with the other rejected assassin's files.

Black Mask (Joker)- Arkhamverse (Batman Arkham Origins)

First Appearance: Batman Arkham Asylum (2009) (Joker)
Batman Arkham City (2011) (Black Mask)

When the Joker first came to Gotham around the Christmas Eve period, he decided to capture and impersonate Black Mask, who had made himself one of the top villains of the city, as he saw that he had plenty of resources and connections. 

After Joker had kidnapped Sionis from his safe house and killed his girlfriend (Tiffany Amborse), he held him hostage in his own Steel Mill, where he tortures him to find out every little detail that he could use to convince Gotham he is Black Mask. Finally after several days, he fully takes up the mantle of Black Mask, now with his power and henchmen at his disposal.

He hired eight assassins to perform a hit on Batman for a one night deal of $50 million. However a slight catch to that, was he kept the presence of the other assassins a secret from each other. 

He hires Deathstroke to set up a trap, involving an exploding warehouse and a briefcase to lure out the Batman. This plan to kill him only failed due to the fact that Deadshot intervened, trying to collect the bounty himself.  Deathstroke confronts him about hiring other assassins, but "Black Mask" ignores this, telling him that although he missed his chance to kill Batman, the night is still young. He then proceeds to beat an injured henchmen to death for no real reason.

"Black Mask" gives the order for his henchmen to bring him Martin Joseph, the warden of Blackgate. When Joesph is brought in front of him, he tortures the later. Along with threatening his whole family, Joker burns out his eye with a lit cigarette, until he agrees to lower the security in the prison.

On Christmas Eve, after the arrival of the assassins and the alterations to Blackgate's security, Joker takes Killer Croc with him to brake into the prison. After murdering many guards and destroying part of the prison, he takes Gillian Loeb (G.C.P.D Commissioner) hostage. He contemplates killing both Loeb and Calendar Man (who is about to be executed), but due to it being Christmas, he thought it would be interesting to see what Day would do. He tells Loeb that he is starting with a new "slate" and that he wasn't on it. He watches Loeb die, before taking his men to the roof to escape in helicopters. However before they leave, he orders Croc to grab the memory card of Penguin's drone that is spying on them.  He berates Croc, threatening to smash his face if the card survived being destroyed by the latter.

Upon leaving Croc to deal with Batman, he strikes a deal with S.W.A.T leader Branden so he can also collect the bounty on Batman's head. He also hires Edward Nigma to put up jamming signals in G.C.R Towers, paying him with the capital that would go onto fund for Enigma's data handlers to be bribed and bought.

While Batman is trying to hack into the National Criminal Database beneath the G.C.P.D headquarters, Black Mask orders his men to plant bombs beneath many Gotham services and buildings: ranging from fire department, sewer pump stations, subway station and the police headquarters itself. 

He goes to the bank in an ambulance, where he kills many of the employees of the bank, tortures some with Christmas decorations and takes the bank manager hostage. Before Batman arrives, he uses Joker Toxin to poison her. 

When Batman does come, he pretends to not know what Batman is talking about. However he gives up and beats Sionis in a rage when Sionis (who he had brought with him to get into the bank, to bypass the biometric control systems) threatens to kill him.He finally reveals himself to Batman, revealing that he was the one who hired the assassins and was running the operation.

Joker sends his men away to kill and rob, while he went to the Gotham Royal Hotel. He hired Branden to keep Batman/ Gordon and the media away from the hotel, before meeting with his assassins in the Penthouse. There he reveals his true identity to the assassins present.

Copperhead- Arkhamverse (Batman Arkham Origins 2013)

First Appearance: Batman Arkham Origins (2013)

Copperhead was a female assassin, who was well known throughout Soth America for 14 diffrent escapes from various prisons. She is also believed to be in a gang, due to having similar tattooes to other known criminals and numerous people taking up the alias of Copperhead, both male and female.

Copperhead came to Gotham on the orders of Black Mask (the Joker), but was arrested by police and held in custody. During her interrogation, the police man was in the middle of saying that she would not be able tio escape again, but is killed by Copperhead, who gets out of her handcuffs and brakes his neck using her legs. She then obtained her contract to kill Batman. She was caught on the Penguin's drone, which Batman used to find out about the assassins and Black Mask's plot to kill him.

At some point during her task, she worked out that Black Mask was really being impersinated by someone else.

Copperhead lurks around the Sionis Steel Mill, waiting for Batman to arrive and sneaking after him in the shadows (a presence he can feel, but not identify.)  She attacks a thug in an elevator using her neurotxins and watches Batman as he realeses Roman Sionis from his trap and tries to interroagte him. She arrives and he tries to bribe her, but she says that they are empty words from a "fallen king." She poisons Batman and escapes, saying that she has killed him and soon he will realises this. Batman identifies the toxin she used from her claws so that Alfred could synthesise a cure. 

She goades and mocks Batman as he struggles to the loading bay, the toxin creating images of the dead bank manager and Gillian Loeb. He eventually meets her, who he persevies as being multiple copies of herself and after a long fight mangaes to use the cure. He eventaully over powers her and hurls her into a storage container. She begs him not to seal her inside, revealing the Joker is holding a meeting with all the assassins and tries to create a deal for him to release her, but  Batman sees through this and sarcastically thanks her, sending an annomyonous tip and leaving her for the police to pick up. She calls him a "Pendejo" through the crate as he exits the room.

Amanda Waller- Arkhamverse (Batman Arkham Origins 2013)

First Appearance: Batman Arkham Origins (2013)

Amanda Waller is the leader of the D.O.J (Department of Justice) as well as being in charge of the government run Task Force-X.

After the capture of Joker on Christmas Eve, Amanda Waller visited Deathstroke in Blackgate. She is accompanied by two men, a replacement staff (with the original being destroyed by Batman), a large handhold bag and a clipboard with information sheets on the Suicide Squad (Task Force-X's other name.)

Deathstroke states that he had figured she would come to see him, without losing focus of his press ups. She slides the clipboard under the cell door, without a word and after he reads it answers his question of subordination by saying that "you rot in here, or you work for me."

Tweedledee and Tweedledum- Arkhamverse (Batman Arkham Asylum 2009)

First Appearance: Batman Arkham City (2011) #5

Cousins with an uncanny resemblance to each other, Deever and Dumfree Tweed both
shared criminal leanings and a fixation on Lewis Carroll's Alice in Wonderland.
Teaming up, they've modelled themselves after Tweedledum and Tweeldledee from
that book, planning often outrageous, absurdest schemes to trap the Batman.

Facts:
Real Name: Deever and Dumfree Tweed
Occupation: Professional Criminals
Base of Operations: Gotham City
Eyes: Brown
Hair: Brown
Height: 5 ft 9 in
Weight: 175 lb

First Appearance: Detective Comics #74 (April, 1943)

Attributes:
> Obsession with Alice in Wonderland
> Skilled criminal masterminds
> Despite being cousins, could pass as identical twins

Tweedledum and Tweedledee
Real Name: Deever and Dumfree Tweed

(Two happy face drawn near the top of the page)

Psychological Profile
The Tweed cousins' obsession with Alice's Adventures in Wonderland is similar to
that of Jarvis Tetch, but unlike Tetch, the Tweeds are not delusional so much as
severely dependent on each other, with a shared fixation on extreme role play.
They know they are not Tweedledum and Tweedledee, but nonetheless delight in
acting like them. Their complex rhyming and complicated in-jokes prolong their
treatment sessions, but the intense aggression they show when separated hardly
make things easier.

ADDITIONAL NOTES
It's difficult to believe they are cousins, as they could pass as identical
twins. I suspect plastic surgery.

I avoid scheduling sessions with them on the same days I'm treating Tetch, as
otherwise the nearly endless recitation of selections from Lewis Carroll would
be enough to make even me question my sanity. Or at least my career choices.

At some point prior to the Arkham Asylum riots, they had formed the Wonderland Gang with the Mad Hatter and other criminals, who were fans of the "Alice's Adventures in Wonderland" books. They had at least one run in with Batman and were deemed insane, being placed in Arkham.

The two cousins were playing on their see saw in the Akrham North, when Batman brings the Joker back to the Asylum. They take the opportunity to escape, leaving their signature and identical hats on the ride.