Anna, well, "saw" the Death Stalker start to wind up its tail. Again, she changed position around the tail, avoiding getting caught in the coiling menace.
Her chains, however, were still firmly holding on and, for all intents and purposes, were also nigh-unremovable at this juncture. Now that it was merely trekking, she didn't waste time, Cranking her semblance down a notch because fuck headaches, she rapidly rummaged through her small bag with one hand while holding both chains with the other.
Taking out two knives, she examined the damage and her options. The chains were tightly wound, so getting one of the pointy utensils in there was a no-no. She did, however, have an idea.
Passing one of the knives through both chains, she quickly looked for the weak spot created by Stsuna's previous strike. Then everything went dark.
Crap. She knew what was coming. Working her semblance at full power again to be able to see well in the pitch black surroundings lit only by the Grimm's red bits, she loaded a kinetic canister in each knife. She stabbed the first one in the weak point, nudging it in a slight crack. She wasn't really sure that did any damage, though.
After that, she scampered back to the tail and took out yet another knife, which she also loaded with a kinetic capsule. Holding it in one hand and grabbing the one inserted into the chains' links with the other, she pointed them upwards before holding both knives with her left hand. She made sure to have a death grip on those, as it'd be essential for the next step.
She then flicked open the device on her belt and waited for the beast.
Ah. There it was. A big load of nothing came into her field of vision, and relativity took her for a ride as she sped down the hole - or was the hole speeding past her? She honestly couldn't tell.
The moment the hole ended - floor came into viewing distance - she activated the transmitter, detonating the Dust capsules. Her plan was to genuinely punch a hole through the weakness made by Setsuna, sever the tail's end and slow her descent to a grinding halt, all at the same time.
She didn't know if any of that would remotely work.