Michelle's extreme eyebrow trim and make-up, paired with her hair-scraping activities, initially made me suspicious that she was, in fact, a Romulan.
However, Romulans are reknowned for their stellar intellect, so not really a starter, is it?
EXCEPT..... we must not forget that Romulans are the war-like cousins of Vulcans. They evolved seperately and do not share the same sensitivities.
Perhaps Michelle is another sub-species of the same group. The result of and experiement that went horribly wrong. In trying to remove the agressive gene, they accidently removed all logical thought patterns and their ability to develop an appreciation of art, literature and and finesse.
Instead they are blessed with a highly developed, predatory sex drive, and are known to be extremely possessive with their chosen mate, whom they eventually devour after wearing to a cachectic gibbering wreck.
Or am I letting my imagination run wild a touch here?