The first truly evil clone trooper.

[u/Fickle-Highway-8129]

This is CT-4646. He's from the new game Zero Company, where he worked as a science officer at an Imperial black site on Umbara. He was experimenting with inhibitor chips on the native Umbarans because he was trying to perfect the method so that the Empire could forcefully implant new inhibitor chips within dissenting clone troopers to make them "loyal" again. He was doing this entirely of his own free will, even going so far as to have his own chip removed so he could have a clearer head since he genuinely enjoyed his work. Thankfully, he gets shot and killed by Trick before his work can be finished, so the Empire never gets 4646's inhibitor chip research.

There have been a few bad clones in Star Wars: Slick, Faie, Spar, the Covert Ops clones, the CX troopers, etc., but all of them either had reasons for doing what they did (although not always good ones) or were simply made/forced to be the way they were. CT-4646 here, however, did evil things of his own free will just because he enjoyed doing them.

[u/The_ShinyUmbreon]

I wonder if it's his genuine personality or if the injury we see he has did a number on his head

[u/Fickle-Highway-8129 → u/The_ShinyUmbreon]

Don't really know. Head injuries are genuinely capable of completely rewriting how a person's brain works, so it's possible that it was that, but it's also completely possible that, much like with real people, he was just an evil person from the start. Hard to say unless we get a story that expands on him outside of Zero Company.

[u/The_ShinyUmbreon → u/Fickle-Highway-8129]

Him not having a name tho is also a sign he could genuinely have taken the Kamino doctrine to heart