Nice! She sounds like a promising character. The description is very well written. The only thing I would say is to be careful of not saying too much, and showing more. For instance with "Did I mention she's a hero?" and the illustration shows she can use fire, but it's not said literally in the text. That's the best part. It's telling, it's interesting, and I'm intrigued!
I hope it helps at all! I'm looking forward to more, cheers :)
RE: E01 of CGS presents: High School Heroes - introducing Jen Rogers