Thanks all...
I finally defeated the last guy, after hitting a couple more buttons (the ones by the Rakashas) and Erika did appear, though she started attacking me? What did I ever do to her? I guess she didn't have her magical defenses up and got charmed...
I still managed to complete the task, losing one guy in my party in the process. If there was one thing that annoys me (take note Jeff!) is that you have to switch out of combat mode to work the buttons...
Wolf