Leon is the only surviving son of his family line, and seeks justice for his slain family. He encounters Prince Ari on his journey, and falls deeply in love with him, pledging himself to the royal so that they might work together to overcome the darkness.

Much like Ari, he has a strong sense of justice, but unlike him, he is physically imposing and immensely strong. The blade at the end of his tail makes for a deadly weapon, and he knows well how to use it.