Anima is the Aeon you get from the temple.

You need to re-visit and complete the trials again in all the other temples, except for Bevelle. You have to do that Zanakand trials again in place of Bevelle. Each Temple has a hidden treaseure chest in it which you must open along with all the other chest.

Once you've collected all the items in each temple then you can open the door to the fayth chamber in Baaj and aquire Anima.