Catch a fish while drifting
Kara will say that she will not eat fish. When you see a fish jump, hit it with your sword. It will come on board. Eat it, talk to Kara, then she will eat it.
Become Shadow and use Aura
Get to the Pyramid which is right after Dao. When you are in it, you will see a dark space portal. Enter it and become the new character. Talk to Gaia. He will give you Aura. Press B to use Aura. You have to see small stones under the floor.