Leki

One of the race of Wolven or Deep Dragon, Reki is a cub who is found and adopted by Cleao, although perhaps it could be said that Reki adopted Cleao, as adult Deep Dragons are more powerful and intelligent by far than humans. Like all Deep Dragons, Reki resembles a wolf rather than a reptilian dragon, and when he uses his innate powers, his eyes will glow a bright green color. As Reki is still very young, he often exhibits young animal-like tendencies, such as chasing after a butterfly.

(Source: Wikipedia)