"Tsubasa Reservoir Chronicle" is a manga and anime series created by CLAMP. It follows the journey of Sakura, a princess, and her childhood friend Syaoran, who embarks on a quest to recover her scattered memories. These memories are trapped in different dimensions, each with unique challenges and characters. The story features a diverse cast, including Fai D. Flowright and Kurogane, who join Syaoran and Sakura on their adventure. As they travel through various worlds, they encounter different versions of familiar characters from other CLAMP works, creating a rich and interconnected narrative.