Yup, it compliments each other, that's why. I am thinking of making Ashley a villain, slowly letting him be taken over by his reverse side. Also, for Lyle, I believe that metal has traces of earthly material inside. Most metals are alloys of one or two of the elements found in the earth, so with experience, he should be able to control metal as well.
The elements found in earth are alkali metal compounds like potassium hydroxide, calcium carbonate (limestone) and things like that. So technically, metals should be made of the same types of elements, just in alloys rather than in the compound states, so its just a slight difference in composition.
Also, thanks, Ichiro, for the acceptance and the SUs. I have a sort of introduction to how they would join the rest, but it has to be done in parts, so I may have to post more often than others.
EDIT: Also, I am planning to have Jade destroy the school, attack his aunt and run off. Any suggestions on where Jade would run off to? Or would you want Jade to lock himself in his room rather than running off?
EDIT 2: By the way, we need more evil superheroes. Almost everyone seems to be going towards the good superheroes path, with none heading to the evil path.