Board Thread:General Discussion/@comment-3121860-20190925044405/@comment-995426-20190925065558

But in TMNT it's often not as simple as who's good and who's evil. Sometimes it makes more sense to see characters as people who may sometimes do evil things. See Shadow Jones (Future) (Mirage), Oroku Karai (IDW), Oroku Saki (IDW), Splinter (IDW), and especially Michelangelo (Mirage). All of these can be considered to have been good people at least once, but have also done horrible things.

No, somehow I don't think we're really in the business of turning character value judgments into categories. We can, however, more easily judge characters by their clearly established pathologies, which is why we have Category:Serial killers, Category:Sociopaths and such. But even a sociopath isn't always necessarily a clear-cut good or evil, because this is more a description of their ethical burdens than the choices they actually make. Though, granted, most sociopathic characters are indeed antagonists.