Definitely quick. He has about a split second to react, and manages to throw up a forearm to block her kick at the ankle — though the strength of the blow still has him gritting his teeth, and his feet even slide a few inches. Levi counters by spinning his body counterclockwise, aiming to deliver a low, sweeping kick while slicing high with his blade almost simultaneously.
fire resists steel, so feel free to have the sword be… not very effective