After you've cleared the Hyrule Castle rift, you'll receive a new outfit for Zelda in Echoes of Wisdom. You can now collect various outfits and change her appearance in the Equipment page in the menu. One outfit you'll want to nab as soon as you leave Hyrule Castle Town are the Cat Clothes. Not only does it look like a bizarre Hyrule mascot uniform, but the Cat Clothes enable you to talk to cats. There are several side quests in Echoes of Wisdom that require this outfit, one of which is "Questioning the Local Cats" in Kakariko Village.