After several scenes Split and Aya make up. *tied Capell and disposed of him* I'm Aya's Man now.
Ahem... party of Capell and Aya. Familiar sound behind you, eh? Play Percipere to uncover BSCH with DRAGON HIDE. Before you go downstairs to that SPN, check to your S - there's a teleport pad back to Kolton, though it's inactive at the moment. Save at SPN, then walk E for a scene. Make your party of Capell, Aya, Rucha and Komachi (my favorites) and return to Kolton's warp. There's also Genma for restocking on provisions or free resting.
Should you need to do anything in Kolton or the rest of the world, now's the last chance to do so. Once you leave for Underwater Palace, you aren't coming back until you beat the game. Add Balbagan to party, then leave to Pieria.
Walk towards the entrance to Plodhif, and before you arrive at the place of battle against the dragon, you'll spot a cracked rock. Balbagan Connect and Gigatackle the rock, then open BSCH for WHITE BERRY POWDER. Go to Plodhif now.
Race to SPN area, Balbagan Connect and Gigatackle the cracked rock, then open BSCH for EMPYREAN CLOTH. Go to Pieria now.
Pass the place of dragon battle (or return to Kolton to get rid of Balbagan if he isn't part of your main team), and continue towards N/NE...