Metalicana

Metalicana (メタリカーナ Metarikāna) is a dragon known as the Metal Dragon. For some unknown reason, he raised a human child, named Gajeel Redfox, and taught him basic knowledge, how to fight and especially, Iron Dragon Slayer magic. However, at 7th July X777, he disappeared without saying a word, leaving Gajeel on his own.

Personality
He hasn't been seen yet, but Gajeel said that he was very selfish

Trivia

 * Unlike the other dragons who raised Dragon Slayers, Metalicana has not made an appearance yet.