Adventurers can't emigrate.
But, I do have an adventurer on AT now that you mention it. Her name's Patchouli, she's spicy more so than sweet, not very nice, and is part of CE. Of course, she might not see much action since right now the focus is on Kylen/Ramuh/Iksandros, and the oddly long-lived Garret.
Er, but Patchy isn't too interested in portal stones, so...eh? Keep it I guess, though I don't think they actually do anything.