Added clarification to Resolve Flame, so there is hard-written things about it rather than just implicitly understood things.
"This is usually just a warm flame that does not hurt the person to be near it, but as it is the sheer manifestation of one's passion, the more Ulv feeds her will into it, the hotter and brighter it might burn. This leads to a problem since Ulv has no pyrokinetic abilities at all, and so when she gets really riled up, she can turn the temperature of a place up several degrees or even outright ignite flammable objects with her presence. The fire's heat scales with Willpower, but Ulv has no control over what it sets on fire or the fires once set.
After reaching the apex of one's passion (GM Willpower) Ulv's Resolve Flame became her reiatsu, not a thing to be used but something that billows naturally from her constantly. As such, the distance that the flame spreads is dependent on how much Ulv releases her reiatsu. And as it grows in temperature and feeds more on her Willpower, it puts more strain on the reiryoku which it spawns from to keep up. So while her maximum potential for firestarting might be terrifying, to feed 100% of her output to ignition levels would be a cripplingly exhaustive task"