>Does the double meaning make 'personify' enantiodromic or a contranym, then?

my thought exactly!
if you look at some of the lists of contranyms (it's one of those things that seems to proliferate on the 'net) you will see how loosely the words "opposite" and "antonym" are treated. one example that we've had here is a 'stranger' popping in with the question "what is the opposite of the word misogynist, or a woman hater"; to which the required response should be "well, do you mean a 'woman lover' or a 'man hater'?" [I've seen the question several times, in several places, and the latter is invariably what's wanted... :-?]