(Wait-are you Katsuki or-)
.. And well, there was.. a figure, standing dead center in the vault, (or whatever you wanna consider the place, back or what), a bit of.. whatever it was, around their arm.. why did it look familiar?.. It was a bit of aura, so to speak, think of it.. as a casing around something, now try imagining it having the brute force of that.. but to only be a mist.