As Assassin's Creed: Brotherhood is the first in the series to feature a multiplayer layer (if you don't count the Assassins Creed multiplayer game for ipod/iphone) there are many multiplayer characters that are playable. This lists all of those that have been confirmed, as well as those that have been seen, but are yet to be confirmed by Ubisoft. Most of them will also be present as targets for Ezio to kill in the singleplayer. It has now been confirmed that there is a total of 17 multiplayer characters in the Codex Version of the game (including the Harlequin and the Officer).
File:201007231036373.jpgA collection of multiplayer characters around the Doctor killing the Courtesan.
Doctor - Wearing dark green robes and a beak-shaped mask, the Doctor uses a poison-filled syringe to assassinate his targets.
Courtesan - A sensual woman in pink, liberal clothing, the Courtesan assassinates her targets via fluidly lethal movements, or a special, bladed fan.
Executioner - A strong looking man that has the appearance of a butcher, the Executioner wields a large axe as his weapon.File:'Upgraded Doctor'.pngThe Possibly 'upgraded' Doctor
Noble - Wearing very rich clothing such as a golden cape, the Noble assassinates his targets using his claw, a prosthetic set in place of his missing arm.
Priest - A bald man wearing robes similar to those of a monk, he uses a very thin dagger as his weapon.
Prowler - Wearing robes very similar to the Assassins, though in Templar colors, the Prowler sports a switchblade, the Templar version of the hidden blade.
Barber - Wearing ordinary noble clothes and having white streaks on his dark hair, he uses a razor to assassinate his targets.
Engineer - An expert marksman wearing mostly red and white clothes, he wields a compass as his weapon.
Blacksmith - A big looking man wearing some armor and a noticeable bright red beard, he uses a warhammer as his weapon.
Soldier - Wearing the most armor out of all the characters, the Soldier wields a short sword.
Smuggler - A woman who wears a hooded robe. She has a hidden blade, but the blade is on top of her arm.
Thief - A woman wearing ragged clothes. She wields half of a sharp scissor.
Mercenary - A strong man who bears a heavy resemblance to ordinary mercenaries but wields a short sword.
Harlequin(limited edition/pre-order exclusive) - Wearing a costume similar to those of the performers of Carnevale, he has a mask to hide his identity and carries two thin, needle-like daggers.
Officer(limited edition/pre-order exclusive) - A sleek middle-aged man, adorned in a fine black cloak.
Hellequin(Uplay reward) - Wears purple and yellow cloths and wields two daggers. She also resembles the Harlequin in appearance. 'When she was unconfirmed, her name was The Jester.
Trivia
Every character can be further customized as the player reaches higher levels.
There are currently three civilian types in multiplayer mode: the Heralds, the Merchants, and the Performers (multiple variations).
Gallery
The Smuggler killing the Noble while a different Smuggler kills another different Noble. Possibly edited to show customizations.