Well, "Suit and Glasses" is the script designation--at least in the first script. I don't know if they eventually updated the designation for the character. It was because Syd first met him at the party before he reappeared to torture her. Remember, she got past him by acting drunk and harmless and complimenting his tie on the initial reconnaissance mission. But I have no problem with him reappearing because he is involved with the people who are principle to the story arc, so it makes sense. And sense he first appeared when they were in Taiwan, I have no problem with the fact that he's Taiwanese. We've also seen plenty of caucasian people engage in torture, including Sloane and his psych division, McKenas Cole--and even Jack!