Bodyguard

Bodyguards are batarians that are encountered during the assignment, X57: Bring Down the Sky. Their job, as their title implies, is to protect and keep Balak alive.

Overview
When confronting Balak at the main facility on X57, Shepard has the choice to either allow the research team to die from an exploding bomb, or to let Balak and his bodyguards go to save the researchers. If Shepard allows the research team to die, a battle with Balak and his bodyguards will take place.

Tactics
Bodyguards carry standard weapons and have light shields. Dealing with them isn't too difficult. Stay in cover and take your shots. Once the bodyguards are dealt with, move on to Balak.