Jon Shepard was an alliance naval biotics officer, spacer born into a military family, leader of the N7 Alpha team, war hero of Elysium, savior of the Citadel, and defeater of Saren. He needed to get back to saving the galaxy in alliance colors, but he couldn't do that without Ashley's perfectly curved ass by his side.
Vincent Shepard, vanguard of N7 Echo, born on Earth, arrested and jailed for rebelling against Detroit authorities, he traded his sentence for military service. He headed the execution of batarian slavers, earning him the title, the Butcher of Torfan.
Steven Shepard, N7 Bravo, wildest and most traveled marine team, born on a working class colony world, Hero of the Skyllian Blitz, and a regular action-jackson. His charismatic leadership and gung-ho, all-in action style make him a favored commander. He's looking to take down a new enemy this time, and to find that blue beauty, Liara.
Alexander Shepard was born on a small asteroid to a mining colony, but his ingenuity got him recruited, trained and placed in the alliance's special projects group, N7 Charlie. As a nuclear engineer with cold calculated logic, Lex will stop the reapers at any cost.