[@Ever Faithful] What about lava powers? She could be like Magma, from the New Mutants. It’s a similar but different power. Could also do microwave powers (I forget exactly what they’re called) like Firestar from the Amazing Friends. Or some sort of weird plasma energy thing. 

I’ve had bad experiences in the past as a GM when two people did the same powers so that’s why this rule is in place - for my own sanity lol