Door to Darkness: Echo of the Heart

Rekka was happy on Destiny Island with her friends Sora, Riku, Kairi, Kiku, and Shuto, her brother. Until a dark storm hits separating her from Shuto, Riku, Kairi, and Kiku. Now she and Sora are some Keyblade Wielders and have to travel the worlds with silly knight Goofy, wizard Donald, and young sorceress Nightsky to find their friends, oh, and save the worlds.