And Chapter 1 is complete!
Isaac Riku and Zappa arrive at Fort Vale only to find it under attack with Sheik, Jenna and Laura outside defending it. After finishing off the attackers, they find that they are soldiers of the mysterious Twilight Empire. The enemy commander tells them about how the Emperor is unknown, but that he knows of the 7 generals of the Twilight. Based off of the descriptions Riku recognizes Ansem, Isaac recognizes Satorus and Zappa recognizes Viper. They return to the castle and tell Jenna everything. Glenn arrives with reinforcements and orders from Link. Zappa, Sheik and Laura are to accompany the three to Renais Castle, and gives Riku and letter for Ephraim. Glenn is also filled in with info and everybody goes their way.
Sorry Chrono Cross/Golden Sun fans! Glenn and Jenna are not playable yet.