You can probably build a good fire-aspect brawler without using many brawl charms - grab an excellency, the balanced charms, the fire signature, maybe charms that you use at specific moments. Then grab resistance, athletics, dodge and evocations. The Athletics "Run places while lighting your enemies on fire" charms seem like good fits for Yang. She does do some grappling - generally not for very long, but some.
I'd be inclined to say a lot of her ranged attacks and recoil-boosted stuff are Evocations of Ember Celica....