[QUOTE=Side-streetdog;6437584]She use Junko's "Rampage Dress"
Mentioned here
https://twitter.com/gouranga_/status...97357699391488
She learn a bit from Junko, but not as powerful as Junko nor can be use all the time
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that's interesting, but still doesn't explain how she bypasses inertia. I.e. a maglev train can move fast, but it still needs to accelerate to that speed over time.
Even if we assume she can strengthen her body and create an extremely powerful magnetic field (not sure how that helps because her body isn't made of metal) we still don't know how she moved as fast as a teleporter. Honestly, it could just come down to a very liberal animator not realizing they were breaking her ability.