Chibi

Chibi (aka Senkōkūra) is a light-elemental dragon, Reiji's dragon partner, and the long awaited savior of Rikyu. As Chibi, he appears to be the weakest dragon, but in his true form, known as Senkōkūra, he is the most powerful of all dragons, and worshipped as a deity by some. In the manga, he is able to change his current element, such as dark or fire (as seen when he's about to turn into his true form).