So first:
For those that might not know, Edward Elric is from Full Metal Alchemist Anime series
Second:
I suggest using https://openlegend.heromuster.com/character to put up the character, helps others see, and they might respond with character sheets created there for you.
Alteration would be a very good pick for the character, although creation (and the genesis boon) might be good as well.
Depending on attribute points, I’d either keep both fairly high, with more emphasis on Alteration, or use Attribute Sub for Alteration and Creation.
Otherwise I think it works fine what you suggested.