Correct, you will need to make a new character for phase 1. At the end of that phase character gets deleted. Beginning of phase 2 you can import your main character(if you have one) and use it from then on. And since they are now linked, yes you can use your character on either system, but since they are linked to the same account, you cannot be logged on at the same time even though they are different systems. Such as having your main logged on to your PC/PS3, and having a alt/mule character logged on with your PS4. This cannot be done. Only way this is possible is to have 2 separate SE accounts.