You should start off by walking directly up the stairs to the top floor, picking up the Tent on the way. Tellah will leave on the top floor, so remove his equipment if you'd like to keep it. Edward will join after the cutscene, and you'll gain access to the hovercraft. Put Edward in the back row, because he's more of a liability than anything else in combat.
Before leaving, re-enter the castle, and this time, head east from just below the entrance, following the castle wall to a secret outbuilding. Here you'll find a nice cache of Treasures, including some arrows in case Rydia is using a bow. Note that if you return to the top floor, you can find pots to restore your party's HP, MP, and status.
Before leaving, re-enter the castle, and this time, head east from just below the entrance, following the castle wall to a secret outbuilding. Here you'll find a nice cache of Treasures, including some arrows in case Rydia is using a bow. Note that if you return to the top floor, you can find pots to restore your party's HP, MP, and status.