Corporal Tai Kaliso (voiced by Fred Tatasciore) is a spiritual and meditative warrior from a tradition of honor-bound fighters, who fought with Fenix during the Pendulum Wars. He views the war from a spiritual standpoint, which often confuses the other soldiers. Nonetheless, he is still well liked by his fellow squad members. Tai is introduced in the beginning of Gears of War 2. Throughout the game, Tai is a resilient and well-disciplined soldier, prompting Marcus to claim that he is "as tough as a Brumak." Early in the game, Tai separates from Delta squad to defend them from Skorge. Delta squad later discovers Tai inside of a Beast Barge, where he has been severely tortured and traumatized. Marcus, unaware of the extent of the psychological damage Tai has suffered, hands Tai a shotgun to help fight the Locust, but he uses it to commit suicide after being tortured beyond recovery. Technically, Tai is not an actual member of Delta Squad, he only joins Delta when his squad is killed by a ticker swarm.

Tai returned for Gears of War 3's RAAM's Shadow DLC as a member of Zeta-Six Squad and as a new multiplayer character.