Jaroth

Jaroth was the leader of the Eclipse forces on Omega, and following repeated attacks from the Turian vigilante known as Archangel, threw his lot in with the other two mecenary groups, the Blood Pack and the Blue Suns. Fancying himself the brains of the alliance, Jaroth organized the three merc groups plan, which mainly involved sending in the freelancers as cannon fodder while the Eclipse and other two mercenary groups each tried their hand at taking Archangel out, also recognizing that the Turian was beginning to tire after spending so long on his own.

In the end though, Jaroth's schemes were all for nought. Commander Shepard and their allies came to Garrus' aid, and together completely wiped out all three of the mercenary groups, Jaroth and his Eclipse mercenaries included. Shepard can also possibly hack into Jaroth's YMIR mech and have it shoot at him and his own men instead of Shepard, Garrus and allies.