So Syril. To me, he's kind of one of the more underrated aspects of this show because of who he represents. For instance, ask yourself this question as I did and see what you come up with. When, if ever, did Syril truly go wrong/evil? I mean, yeah, he's a try-hard, and WE know that when Andor kills those two guys, it's because they were shaking him down and threatening him, but Syril doesn't know that. He's just a law and order dude with a belief in something he likely doesn't know or fully understand the true nature of until it is way too late. He disobeys his boss's direction in pursuing Cassian, so you could say that was wrong, but that was more procedurally wrong rather than a good vs evil type of wrong. Then he goes about committing more procedural wrongs in an attempt to clear his name, which lands him in Dedra's crosshairs, but again, nothing with true knowing malicious intent. I'm not sure he ever really goes wrong from a choosing evil standpoint (maybe some of his actions with regard to the Ghorman Front, but even then, he is trying to figure out if outside agitators are breaking what he perceives to be the law). He is a great case study in how somebody with a stringent set of beliefs, who is being pushed by family to make something of himself and lacks the ability to discern the bigger picture can have those set of conditions used by evil to do their bidding while he cheers himself along almost all the way while doing said bidding.