Archer

Biography
Archer is never seen though he provides very critical help during your takedown and defense of Makarov's safehouse in Loose Ends, providing sniper support and taking out a few armoured trucks with Javelin missiles. It is unclear weather Archer was killed in action or survived since he was at a far distance from close quarter battle that occured at Makarov's safehouse. Archer may be still alive and avoided Shepard's men when revealed he is a traitor and killing off all members of Task Force 141.