garrus vakarian
A Turian squadmate in Mass Effect. He can (depending on player choices) be kept alive and recruited through all 3 games. In the second and third games, he is a possible love interest for female Shepard.
He is one of only two characters to be playable in all 3 of the original trilogy games, the other being Tali'Zorah. He enters a romantic relationship with her should the player not follow his romance route.