Wonne & 「BABYMETAL」
「BABYMETAL」 is able to split apart the elements of any liquid at a molecular level with the needly points of its hooves, turning them into a solid form of the metals or metalloids it is primarily composed of. As these new metal(loid)s are in pure form, chemical reactions can and do occur*, so Wonne must take great care with her surroundings when using her stand. 「BABYMETAL」 is also just a fucked up deer made of knives, which helps in stand-to-stand combat and also when the house scissors have slipped this plane of reality again & you really feel like making some more new snips in your coat.
*Wonne figured this out the hard way on a beach trip at age 7 when she really wanted to wade further into the ocean & tried making a sodium bridge. She then began very intensive chemistry classes throughout her life.