New details regarding Final Fantasy X-2 have surfaced in the recent issue of V-Jump. Not only Yuna, but Rikku as well will sport a more candid outfit, compared to Final Fantasy X. So far nothing about the third character is known, except that her name is Pain. Unlike its prequel, Final Fantasy X-2 allows for characters to change their costume. The costume depends on the character's current job, which can be changed even during battles, just like equipment in FFX.
Yuna and Rikku are confirmed to be members of Kamome, a group searching the world of Spira for spheres and whose rival is the Lubran Clan. Furthermore, it was revealed that a new aircraft named Celsius will appear in the game.
Final Fantasy X-2 is set to be released in Japan sometime in March 2003.
Update: We now have a scan showing off Rikku's new outfit (or lack thereof), courtest of Quiter: