Your first stop is Baron Castle because you need to upgrade your airship to have a hook so that you can lift the hovercraft. Let's go inside the castle and talk to one of Cid's boy (just follow the map).

Take your airship and hook the hovercraft, then fly to the continent at the bottom-left corner of the map.

Once you reach #7, you'll get your final member, Edge, to join your party.

Augment:

• This one is not required but I recommend giving Reach augment to Edge because it fits him well.

Item checklist:

• Shuriken (x2)
• Remedy
• Vampire Fang
• Ninja Sutra
• Potion (x2)
• Ether
• Tent
• Hi-Potion (x3)
• Bomb Core
• Cottage
• Elixir (x2)
• Spider Silk
• Silver Hourglass
• Phoenix Down (x2)
• Blood Sword
• Gold Needle
• Dry Ether