"A-are you sure this will work, Sabrina?"
"I may have injected a bit too much Grief-Aid into the system last time, but this time I'm positive it'll be just fine!"
Unknowing that she didn't actually answer her blonde friend's question, Sabrina began to flip increasingly-large switches with labels in Witch runes.
Naturally, Mami -- presently strapped into a device that seemed one part hairdressing-machine, one part Frankenstein's laboratory, one part H.G. Wells's Time Machine, and small part tea set -- was beginning to get more than a little concerned, but her faith in the silver-haired SCIENCE!tist's care for her well-being kept her from voicing further worries as part of the device lowered further onto her head.
"Alright, ready, Mami?!"
A shaky thumb's-up (or was it a thumb's-down? Her wrist was strapped to the armrest in such a way that it was hard to tell for certain) was the only answer Sabrina got that wasn't muffled by the machine, and thus with a few last-minute thoughts of megucas' 'things' and a mental debate that this was a bad idea why are we doing this BECAUSE SCIENCE! OF COURSE, Sabrina flipped the final toggle and thus started the horrifying, electrified process.
Two hours of miscellaneous bits of Grief-and-tea-fueled machinations later, and the device stopped. Mami, to Sabrina's credit, was not dead or a Witch yet, so it at least was not a complete failure. Several clamps were quickly undone by the 0-year-old with equal amounts eagerness to see the results and determination to apologize to Asunaro and back for subjecting her friend to that, when all of a sudden after the restraints on her arms were removed so too became the rest of the device. And Mami wasn't sitting in it anymore.
"I'm going to assume this was not your intent, Sabrina."
Sabrina turned around slowly but surely . . . to find, standing with a charisma recognizable only in one other magical girl, Mami Tomoe -- or, perhaps Mami Akemi was the proper name now, as the machine had seemingly given her Homura's hairstyle, facial structure, and even mannerisms. And, as she then proved, the time traveller's thing, too, as waves of blonde hair became blown by a breeze known only to it.
Sabrina, to her credit, only fainted after the last lock settled back into place.
Mami would later apologize profusely to her friend for the practical joke, though she refused to share where she hid the pictures she'd taken of Sabrina's gobsmacked face. Homura, on the other hand, apologized for none of it, deciding that the days spent working every last bit of dye out of her hair were worth the cooking lessons Mami continued to pay her with for the next few weeks.