I don't know what type Joy really is. I just know that she's having to try to hard at the present moment to appear LIE for her to really be one. Unless she's just
that crazy...
However, if I had to answer, I would say that I see her F (particularly Se+Fi) in the fact that she loves to cultivate her relationships with people on the forum and spread her influence in precisely the manner that I've been pointing out: for her, it's PMing people, and developing relationships independant from the atmosphere of the forum. You'd never guess it, but Joy and I are rather good friends: we've spoken on the phone multiple times, and used to routinely offer one another life advice, consolation/condolences, etc.
I think Joy has stronger Fe than she tells us, or perhaps even really believes: she's perfectly capable of making people like her and ingratiating herself with anyone she comes across. However, for her, the relationship with the individual CLEARLY takes presidence over the "social" atmosphere: there have been numerous times when I've been arguing at least somewhat heatedly with Joy in a topic on the forum, and was suprised by a new PM in my inbox mid-bout about a completely different subject, in (to my boundless bewilderment) a perfectly genial and familiar tone. Throws me COMPLETELY off-guard (which is probably why she does it

).
Joy is also quite obviously a powerful and influential figure on the forum. Without having any particularly specialized or well-developed knowledge of socionics, she has risen to the position of "Queen Bee," and could hardly be deposed, even if someone dared to try

She obviously knows how to get power (Se), and her preferred method is by being a highly visible (extroversion) and openly controversial (unvalued Fe, valued Se) figure in the grand scheme of things.
She has also always been unreceptive to the reasoning and complex explanations of others regarding the mechanics and workings of socionics, preferring clear, concise explanations of the basic criteria, along with what she sees as objective criteria and facts, in determining her type and that of others. Ti PoLR, Te dual-seeking.