He seems similar to mcbain in a lot of ways really. Probably same enneagram and instinct stacking (sx/so). And of course xIE-Ni definitely for both.
Essentially, same introspective stuff with the same dramatic flair. But then, even my LIE-Ni ex (who was also sx-first) had the dramatic flair a bit. Just he would naturally default to dry Te after he was done with the social drama mask.
So that's the question here - what does Cuivienen default to if going beyond the social mask?
I'm inclined to think he defaults to Te as natural.
(And same for mcbain yeah.)
PS: This is not to imply that the dramatic mask is "fake" in some bad way. I tend to just see it as some approach to socializing with people that can be quite entertaining (same with my ex, etc).