User blog comment:Inept Wiki User/Speculation: The other Celestial Spirits/@comment-49.176.2.181-20130612141802/@comment-4829046-20130612142829

Yes that is a problem but Why do they need to learn new magic at all? Martial Arts ftw!!!! =P Lucy trained her agility and her skill with the whip to make up for it, unlike most holder Type mages. If they actually practiced martial arts, they won't be entirely useless and they won't have to learn any magic other than the one they are naturally talented with since birth. I believe that Magic is something inherent or unique or connected with the individual. And I think it takes considerable training and wisdom to be able to employ all new magic. We have seen that Laxus trained entirely on Lightening Magic so as to hide the fact that he is a Lightning DS. In other words, he was naturally compatible with Lightning.

Jellal has been shown to utilize multiple types of magic since Ultear brainwashed him, but there is where it lies "brainwashed", in other words, it wasn't him. Also, he used his signature Heavenly Body magic only when he got serious, and he continues to use only it after the time skip so its safe to assume that it is the magic compatible with himself.