|Voice Actor||John Swasey|
An Amalgam agent and the head of Amalgam's Execution Squads, Gates seems to have two personalities. He is known to kill his subordinates whenever he messes up an operation, hears that an Amalgam-sponsored mission is a failure and (for the most part) when he is angry. Gates kills through a variety of methods including shooting an Amalgam commando in the head when he back talked and crushing Xia Yu Fan's Shadow Arms Slave with extreme ferocity. He is also shown to be highly abusive of his subordinates with him kicking his second in command off a helicopter and nearly drowning him in a pool.
Despite such brutality, Gates showed his intelligence by being able to deduce accurately the tactics that MITHRIL's Special Response Team utilised in their intervention of the Balic civil war. At one point, Gates began to sing Ave Maria while Xia Yu Lan and a group of Amalgam commandos began to kill every armed Balic soldier. One light side about Gates is that he is protective about himself, especially about being bald since the front of his head shows no hair present. Gates is killed by Sousuke when he uses the Arbalest's Lambda Driver in full power to defeat his Codarl Arm Slave. Gates is shown to be accepting of his fate by playing with a strand of his hair saying "Maybe I cut it too long?" while his machine was facing total destruction.
It can be assumed that Gates was known as "Mr. Kalium" throughout Amalgam, as in the light novel, A Dancing Very Merry Christmas. It is said that Gauron (otherwise known as Mr. Iron) was responsible for the death of Mr. Kalium (Gauron does put into motion a series of events that end with Gates's death, though Gauron's only intention seems to have been to lure Sousuke to himself).
It is shown that he is also a sexual deviant. He proves this by saying how even though Xia Yu Lan and Xia Yu Fan were underage he did not hold back to "satisfying" them as well as himself leading him to being a pedophile. He also calls them Lolita-kun (lolita is a unofficial term for a child in pornography) when taunting them for escaping. When he manages to acquire the body one of the girls it makes references to the idea that he will dabble in a spot of necrophilia with either or both of the girls bodies. In the same scene where he finds out that the girls have escaped, it depicts him being interrupted in the process of masturbating over the image of kittens on his wide screen TV. A truly twisted individual, that when concluding his communication with Xia Yu Lan and Xia Yu via his television he returns to his previous channel which is now depicting squirrels. It would seem that on top of pedophilia he has a penchant for bestiality, at least so far with small "cute" mammals. Gates can speak some Mandarin aside from English.
It is very possible that he had some disputes with Gauron in his past at Amalgam, both of them being high ranking members of the organization, because it seem that Gauron wanted also to make Hong Kong a "sea of flames" to get back at Amalgam and to send the organization into a panic, even if he's officially intention was to lure Sousuke at him. This fact can be demonstrated because Gates and Gauron have two similar terrorist ranks and skills.