Sarin is one of Warlord Gantas' three lieutenants who players will face during the invasion of Gantas' Fortress. He's a tall man using a sniper rifle as his main weapon.
During the Raiders VS Bottle Rockets event, players faced a more powerful version of Sarin. The reward for defeating Sarin and his troops was up to five skulls, depending on the level.
With the 2.0 Patch, Sarin makes rare appearances as an invader. When invading, he has several different formations depending on the player's level. One of them includes Lvl 40 Brawlers to his front and sides, with a rock protecting him against back-stab attacks. These encounters reward 3 .
He later comes to the player's outpost for help because after Gantas was defeated, a leadership vacuum was created. Since Sarin was an outcast, he could not be chosen and since Crazy Blades is capricious and she left and one of her "connect to herself" trips, she was not chosen. This left Tronk, who Sarin knows is a brash cretin. Later, after Tronk is defeated, the Raiders all go to Sarin as their new leader, even though he is an outcast.
Sarin is also seen in the limited time promotion of the Deadeye.
Sarin is shown to be a respectful, yet dangerous enemy. He relies on the seclusion of his sniping, rather than Tronk's brash straight open attack, or Crazy Blades' hidden stealth. He is shown to be patient and respectful of his enemies. He is regarded as an outcast by his fellow Raiders because they deem him and his snipers are cowardly. After Warlord Gantas' fall, and Tronk succession, and then fall, the Raiders finally go to him as their leader.