The Cloud creates thick clouds all over the sky which it can move however it pleases. Like The Rain card, it has a gentle and playful personality and is more mischievous than combative. The Cloud's true form is exactly like the one on its card: a pure white child with a light blue cloud wisp on its forehead standing on a dark cloud. In its Sakura Card form, the cloud at the bottom is no longer there and you can see The Cloud's feet. The Cloud is under The Watery.
It was captured in Episode 39 where it was causing the clouds in Tomoeda to rain continuously. It was sealed by Sakura, but Syaoran became it's master. He ultimately gave The Cloud to Sakura at the end of the episode.
Cloud is transformed during Sakura's panicked rush of transformations during Episode 69 in the original Japanese episode. In the English dub, Cloud is transformed in Episode 53 during Sakura's panic in place of what was originally The Libra in the Japanese version.
The Cloud appears in the Tsubasa: Reservoir Chronicle manga, being part of Suzuran's troupé in Shara country.