Maybe it was due to the alien's influence but I found Kang remarkably dishonorable. He is taken prisoner, after threatening Kirk and his men with torture and death, has his wife and surviving crew rescued and quartered by Kirk...and yet he immediately sets out to wrest the ship from him and "put Kirk's stuffed head on a wall."
You mean, he acted like a Klingon.
I often wondered if the Beratis, Kesla, Redjack, Piglet, whatever alien and * were similar or even the same. One possessed a body and lived on fear, the other seemed to be quite a bit more dangerous and lived on hate. Maybe it was an exiled Orgainian that liked pissing things off, the opposite of the rest of them being disturbed by strong emotion. Maybe
Trelane without a body, he could change things. I'm just thinking about the nature of * I don't really think it was one of those others, but it has some aspects of the others, too.