Infrared really needs to rethink on her choices. She went from having a 20% headstart in Aura before contact even begins to well, now. A glance over the history of the battle reveals being at range is favorable while closing in isn't, which offers a solution to her current predicament: Run. Yeah, it's not pretty, and she risks being flat-out caught up considering she's not all that fast, but it seems like she is decidedly less competent at sword fighting then he is. But there's a good reason this is the usual executions of one of the golden rules of combat, hit your enemy and don't get hit by them.
[Grab approved by Monster.]
Focus... observe, Clink!, Infrared managed to block the first lance strike by half-swording a parry from aside, then when Kei goes for the second time, she managed to get a hold of his lance and withstanding the charge on it, yanked it hard and used it and Kei's body as leverage, dashed right past him and started rushing down the mountain, back to the rocky side of the field where she left the instrument needed to utilize the hopefully increased range. The girl needs the help of added speed from moving down for that, but not her semblance even though it would help because she can't really take more hits.
Once at the base of the mountain, to unload some of the weight she carries, with minimal aiming at the now shortened mountaintop she launched the loaded rocket there hoping to inflict at least some damage.
Battle data:
Aura: 26%
Reaction: 16 stored
Actions:
Rocket: 20% direct hit/up to 15% off-center/up to 9% splash damage