Vanitas

Vanitas serves as one of the main antaganists in the ZeldaKingdomHearts series. He first appears as an optional boss in Dark Dreams, and then appears as the main villian in Emerald Sword. In the beginning of Emerald Sword, he starts talking to Link, telling him to come down along the path, to find him. Link finds him and attempts to defeat him, but fails and wakes up in Termina. He encounters him again at Aquas Ocean, then the final time in The Past of Termina. After he defeats him the first time The Past of Termina, his true face is revieled, appearing to have the same exact face of Sora, his best friend. He then battles him again, then other round when Vanitas revives Xehanort. After he defeats him along with Xehanort, he tells Link that he will meet him again. So Link says goodbye to Clera, Steven, and Kyson, his new friends, and heads back to Hyrule to train, so he will be ready when that time comes. It is possible that he will return in Destiny's Return.