| WHAT THE HECK IS THAT?!
The naming of the page, "Traitor (Prototype 2)", has not been confirmed by official sources.
This Traitor seems much more competent then the first Prototype. He is a sinister individual who serves Shaula and has been shown to follow her orders to the letter to please his mistress. He's also shown to be ruthless, attacking Anya Hepburn despite her age.
He also seems to have a love for fighting, wanting to put himself against Shibusen's stronger students in an effort to test his own abilities. Due to his personality, there's a chance he is a traitor who has actually willingly joined Shaula.
This individual is characterized solely by a sinister sneer and the peculiar presence of a "Scorpio" symbol (♏) emblazoned on his right eye. This emblem is repeated upon the upper left of his jacket, which due to its rolled-up sleeves reveals two scorpion stingers tattooed on his exposed right forearm. The remainder of his attire is comprised of a pair of adorned with a small chained ornament in the shape of a scorpion stinger, hanging from his waist.
Prototype 2 sees Shaula as his mistress, following her every command and willing to assist her in anyway possible.
See also: Northern Praying Mantis
His favoured fighting style displays similarities to that of the Northern Praying Mantis and is complemented by his weapon of choice, a poisonous stinger worn on the index finger of his right hand. He appears to be uncompromising in battle, striking unannounced with lethal intent at Anya Hepburn despite her age and even resorting to dirty tactics, while the confrontation still remained in his favour.
During his battle with Anya in the anime, he displayed great speed and was able to get the upperhand during the battle. Even after the intervention of Meme Tatane, he kicked her to the side. The fight was only stopped when Akane and Clay Sizemore intervene and stated that they were of the N.O.T Class.
The Traitor was able to easily infiltrate one of Shibusen's prisons, kill the first prototype and escape.
Scorpion Finger Stinger: The Prototype 2 Traitor's weapon. It is a poisonous stinger sharp enough to cut through skin.
This Traitor makes his first appearance after observing Anya roaming the streets of Death City, before immediately attacking her once she had been identified as affiliated with the DWMA.
Narrowly missing with his initial strikes, a brief confrontation ensues, resulting in Anya's poisoning after he prevents her from retreating by stepping on her foot. However, due to the combined interference of Tsugumi Harudori, Meme Tatane, Akane and Clay, he takes the decision to temporarily depart.
Returning to Shaula's present location, he reports upon his previous activities.
He comments to his mistress that Shibusen will soon find them and that they should go into hiding.
He is later seen escaping the prison where Prototype 1 was being held, by the rooftop, after killing him. He leaves a message on the wall written in Prototype 1's blood stating: "While you are sleeping we are still awake and keep moving." 
- His choice of fighting style is an actual martial art in the real world.