His outfit highly resembles the ones worn by doctors during the plague and appears black in the dark. His face is concealed by a mask, therefore making his true identity unknown. His outfit is different than what the doctors wear in Assassin's Creed II. The beak section of his mask is shorter than the ones worn by the doctors in Assassin's Creed II. Ubisoft said that he will make an appearance in the single player mode of Assassin's Creed: Brotherhood along with the other multiplayer characters.
The Doctor charges at his target and swiftly sticks a syringe into the target's shoulder injecting poison into a vein, before the victim can recollect what has just happened his/her eyes roll back and he/she then collapses to the ground and dies silently.
