You MUST get the items from the temples..
You can get all those HP spheres etc quite easily elsewhere and you won't be able to get into Anima's chamber..
You'll know you've got them in the temples because when you open the chests you'll see symbols that appear..
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Adopted FF Character | FF Pet | Anime Character | Game Character: Aerith | Gold Chocobo | Skuld | Xiao Qiao
Weapon: The First Tsurugi
Member of the Death Flash Clan
Straight on this long, continuing road.. There is surely something to believe in..