Lieutenant Colonel Gregory Barrows (グレゴリー・バローズ中佐, Guregorī Barōzu-chūsa) is the leader-in-chief of the Biological Weapon Special Operations Unit (aka the Hamlin Battalion). He also serves as Time Crisis 4's chief antagonist.
Barrows has gray hair that is shaved to almost bald and blue right eye. The red left eye is bionic. There are tattoos on both his arms.
Barrows is naked from waist up with a harness on his chest, wears pants of regular Hamlin Battalion soldiers design with a black belt around his waist and black combat boots. He wears a armband on his lower left arm and black gloves. As for equipment, he has a radio on his left shoulder and a dogtag on his neck. As for weapons, he is armed with two Desert Eagle handguns and uses all types of Terror Bites.
Barrows harbors stiff and absolute feelings of discontent from the poor treatment and lack of authority he garnishes whilst serving as a part of various secret regiments of the U.S. Army throughout his life. The type of person who believes he has the right to do whatever he pleases by any means necessary, Barrows is labelled as a dangerous and untrustable individual.
A good example of Barrows's personality was his utilization of the Terror Bites for his evil purposes, in which he used them to attack Buckley Air Force Base by surprise and programming computer-controlled UCAVs to destroy all U.S. major cities. His hard reasons for betraying his country remains a mystery as players will be able to know why Barrows did so in the PlayStation 3 conversion of the game.
In combat, Barrows handles two Desert Eagle handguns with ease. Barrows' red bionic left eye performs two functions: it transmits signals so that the Terror Bites cannot attack Barrows, and also control the actions of the bio-weapons as well. Once Barrows expended all his supply of Terror Bites, he retreats to the control panel which has two laser sentries firing slashing lasers but requires time to charge them.
|“||Soon every major city in the U.S. will be engulfed in a sea of flames! (A screen display shows UCAVs flying to their targets followed by a map showing the locations of targets) You two are gonna die here!||„|
|~ Gregory Barrows, before battling the V.S.S.E. agents Giorgio Bruno and Evan Bernard|
|“||The UCAVs are ready to attack!||„|
|~ Gregory Barrows, after destroying the stairs while the UCAVs were preparing to launch the nuclear cruise missiles|
- His physical appearance barely resembles that of Bryan Fury from the Tekken series of fighting games, and his heterochromia resembles that of Kazuya Mishima's from the same game.
- Interestingly, his outfit is a nod to Bryan's primary outfit in Tekken 5 until Tekken Tag Tournament 2.
- The only difference between Kazuya and Gregory to gain heterochromia is, Gregory has a bionic eye on his left eye while Kazuya gains a red left eye due to being reconstructed by his own Devil Gene after his revival in Tekken 4.
- He is later shared by Juri Han from the Street Fighter series who is also implanted with a left bionic eye known as the Feng Shui Engine, as Juri's left eye glows pink during its activation.