Invisible opponents is a bit more of a problem. Whipping out her tricorder takes time and leaves her more vulnerable.

However, Delia is quick on her feet if nothing else. She slings her weapon back over her shoulder, revving her bike and taking a quick glance around as she suddenly spins her bike in a wide arc.

Less an attack--more flinging snow everywhere to land on invisible opponents, reveal their positions with their surroundings.