Ok Xan, time for my critique:
- Like Thoul said, her forearms are too thin and her hands are tiny. It's out of proportion to the rest of her body.
- She needs more shading on her armour, especially under the chest area, otherwise it looks a bit one-dimensional. Remember, the more shading you add, the more professional your work will look. I know it's just a fan art, but you can still apply the same theory to all sorts of drawings.
- Alisa does appear a bit curvy for her tender years. I doubt a girl of 15 would be so well-endowed by that age.

- Her shoulders are a little to broad, and this has also made her * area appear a little too big.
Hope I wasn't too harsh, but there you go. =)