I'd like to second (or third?) Eleusynia
She's helped me with:
* Kazham Keys (which took way longer then we'd expected so she postponed her own AF run to finish, <3 Eleu)
* Rank 3 and 4
* She spent 3 days helping me farm Yag necklaces in Giddeus for my Norg fame (and taken me to Norg countless times now cuz I was too clueless to remember the damn way ><, btw Eleu I think I finally got it :P)
* Without me even asking her, she came to get me in Altepa Desert when I d/c'd from my pt and came back to find them gone. It was my first time there and I had no idea where to go. I /telled her to ask her for directions and next thing I know she's right there leading me back to the telepoint (got my crystal ^^). She even had a friend come meet us so I could get a teleport and take a Chocobo back to Jeuno (last time I ever set my HP at the outpost ^^;)
Despite her old Shell having broken up and the complete #$@holes that some of the old members were to her in the days leading to her breaking the pearl, she still takes time out to check on all of us and see how we are doing. She still takes time out of her busy in-game life to help us out with the smaller things and to answer any questions we ask her (If anyone knows about this game, It's Ele, and if she doesnt know she'll find out for you). And if you ever need a friend just to talk to, she's always there too.
As someone said in another thread not long ago, She's one of the reasons I still play this game and if she ever left it would truly be a sad day in Vana'diel.