>You might say "couldn't a high D (dark traits) person mask as a low D person, as a wolf in sheep's clothing?" I don't think so, or at least they usually won't.
"person"
The analytical error here is the assumption that political actors are individuals -- we're certainly trained in US to think that way -- but historically political actors are part of some sort of collective process. To wit, we could be dealing with a high D ideology and a well trained member.