Sidonis

Sidonis is a turian, against whom a "familiar squadmate" holds a grudge. At one point during Mass Effect 2, Commander Shepard is in an argument with Sidonis while your teammate tracks the turian in their sights. Shepard must attempt to reason with Sidonis while blocking the squadmate's line of fire. If Sidonis breaks away, you have the option to paragon interrupt him, keeping him behind cover and allowing you to reason with him further. If you fail to initate this, he strides into the open and is subsequently gunned down by your squadmate.