Yes, Tetra is one of the princess' Zelda's (There are either 3 or 4 different zelda's depending on who you ask).
Yup
Tetra
actually, from what I now from the game, tetra is, infact, Zelda. Its one of here disguises
You don't.
Zelda does not appear in 2 games: Link's Awakening (DX) and Phantom Hourglass.In Phantom Hourglass, however Tetra is the alter ego of Princess Zelda, so you can still say that Princess Zelda did appear in this game, just in the form of Tetra. In Link's Awakening (DX) Zelda isn't even mentioned once.
Defeat Belum and and save Tetra
Yes, because shes Tetra the Pirate!
I'm pretty sure she's Twelve. Zelda is always the same age as Link,and she is Zelda so...
Wind Waker
Zelda makes no apperace in Phantom Hourglass, exept under the name of 'tetra', the person your are aimed at saving.
Most likely you are referring to Tetra. Tetra is the leader of a band of pirates that sail the sea looking for rare treasures.
No, it isn't. It is only in Japanese and only available in the Japanese edition.