Collins

Corporal Collins is the first UNATCO trooper to be seen in the game. Collins has a nice friendly attitude towards the player and Paul's actions (later discovered in the game). Collins wields a pistol at the start of the game, but switches to an Assault Rifle during the time he is in UNATCO HQ.

Background
He is first seen patrolling a dock in Liberty Island, then he is seen filling out a report on the mop up operation of the situation in Hell's Kitchen on a computer. He is seen talking to Sgt. Michael Berry about the Ambrosia situation, looking at it philosophically. His whereabouts are unknown during the time JC escapes the MJ12 facility, where JC was held prisoner.

He has his own office at the UNATCO HQ, which the player can loot.

If he is killed by the player at Liberty Island he will come back anyway to talk to Michael Berry after JC finishes his mission at Lebedev's airfield.

He's likely dismissed from UNATCO after JC's escape, like Kaplan and Berry, as stated by Paul Denton in Hong Kong.