User blog comment:Perchan/Fairy Tail 395- Something Something Dragon Slayers (Tartarus arc, Part 5: Ultimate Pain)/@comment-16235745-20140803224640/@comment-14973435-20140804003235

Eh. I doubt that. Mostly becaue all of the Dragon Slayers that have Dual-Element Mode have a certian past connection to the person that they ate the element from. Wendy has not really shown to have such a thing.

Besides, Wendy would be unable to devour Gray's Ice. It would have to be the ice from a Dragon Slayer that she would have to devour. If anything, her dual Element Mode would be Holy Sky Dragon Mode. It would tie into her magic quite well.