Anatoly Knyazev

Anatoli Knyazev is the leader of Solntsevskaya Bratva and in the comics, known as KGBeast.

Biography
Oliver Queen, during his stay on Lian Yu, saved Anatoli from Anthony Ivo, causing Oliver to be awarded as a captain of Solntsevskaya Bratva.

Season 2
In "Crucible", he is in the prison cell next to Oliver on the ship they are held at. After Oliver is shot, a bandage kit is next to him, and Anatoli tells him that it is a test to see if he is strong and shows the wound he has.

In "Keep Your Enemies Closer", Anatoli appears in both the present day and island flashback scenes. In the flashback scenes he appears as a prisoner in the cell next to Oliver's aboard the Amazo. While in his cell, he asks Oliver whether or not he will return to free him and the other prisoners. Oliver then assures him that he will. In the present day Anatoli greets Oliver and John Diggle in Russia to help them rescue Diggle's ex-wife, A.R.G.U.S. agent Lyla Michaels. He provides them with intel of the gulag Lyla is in and helps them with extraction.

In "The Promise", Anatoli, along with the other prisoners, are freed by Oliver and Sara. He escapes onto Lian Yu with Sara and Thomas Flynn.

Personality
Despite his status as a mafia leader, Anatoli seems to be a man of honor as he awarded Oliver Queen the rank of Captain in the Bratva, and therefore granting him access to its resources, for saving his life, even though it was extremely rare for an American to hold such a rank in the organization. Even Oliver stated that his relationship with the Bratva and Anatoli is an extremely valuable one. Anatoli holds Oliver with high regard to the point he doesn't hesitate to help Oliver in anyway he can and also takes an immediate liking to anyone Oliver vouches for.

Trivia

 * After Deadshot, Firefly and Dollmaker, KGBeast is the fourth member of Batman's rogue gallery to be included in the show. Although, he is the first one to appear as an ally.
 * It is possible that Anatoli was the man who taught Oliver Russian.