I have Alexander. He has a power that allows him to understand everyone's powers and how they work. He's a hunter so he would be insistent that she learns how to use her powers if he sees her out of control. He's not really fire-resistant but he'd be the only one out of the three that might force her into anything.

I also have Sterling - his power is actually to control fire but he definitely wouldn't strong arm her into anything. He's more of a gentle soul but he might be insistent that she learns how to control it if he saw someone get hurt or something. Plus side though - he's also a witch.

Finally I have Tetradore - he's definitely strong willed enough that he could go head on head with her. He, however, might need a bit of convincing to be her teacher (because that sounds like effort with nothing in it for him) but he'd certainly impress upon her that she needs one. His powers do make him invulnerable to her fires though.

Let me know if any of these interest you and if not, I might suggest maybe checking out some of Kite's boys. She might be able to provide you with someone.