Well, this the first omake I've ever made, it will be about all the things Mei had to go through to make Toga's costume.
Just as Toga had told her that the substance disappeared in a few hours, Mei went to work.
"Okay, let's see," she looked at the jar, "this thing is obviously organic. Hmm," she thought for a few seconds, "... I know! Towards the microscope!"
Mei run to where the tool was, her quirk gave her a really good sight, but it wasn't enough to see microscopic objects.
After stumbling over a lot of junk and saving the jar from falling a lot of times, she arrived at her objective.
"Let's see," she said while analyzing the sample under the microscope, "Aha! Just what I thought, it's some kind of polymer, but it can go through fabric," she said while leaving the tool aside. "That means her clothes will need to be made of some kind of polyester so this thing can go through it without also taking the costume off. Now the question is, of which percentage must be plastic and cotton?" she stroked her chin.
Hatsume then went towards the fabric samples that was at the other side of workshop, for some reason Power Loader had put that far away from her work station.
"Let's see what we have here," she said while looking at the different fabrics. "Obviously it must be resistant, flexible but with cotton in it so that thing can go out. We don't want the costume inflating like a ballon."
Mei then took out a sample of polyester at 50/50.
"Zoom!" she said, activating her quirk to see how the substance went through the fibers. "Hmm... it goes through it very fast, let's what happens with 60% being plastic. No, wait, what I'm doing? She also said she could copy clothing. I'm better modifying that new fabric. I'm running out of time," she looked at the jar and it was ¾ full.
The new fabric was an idea Power Loader had with Best Jeanist. It simply was a replica of the fabric he created, even if it seemed just like jean cotton it was actually really strong.
Mei took a sample and saw how the substance went through it very quickly.
"Excellent, now I just have to improve it," she quickly went to a loom they had in the workshop, but this loom also allowed to modify fabrics by replacing some fibers with those of other materials. She decided to replace some with Kevlar, graphene and the same fabric Mt. Lady used, while also making it resistant to heat and cold.
"Now let's experiment again with this weird thingy," she said, dropping a bit of the substance on the fabric. The speed at which the substance went through the fabric was slower but still fast enough. "Alright" It's done!" she shouted, taking note of the changes she made and putting the note next to the new fabric.
Now she had to make the blood sucking machine and think how to store it and keep it cold.
Mei then thought about a box with extensible syringes. But she quickly discarded it and decided to use several cans for the waist with buttons and a tube for the mouth, ad thus allowing to change blood with one or two buttons.
"But if she uses blood, that means she fights up close. She needs weapons, a knife and aa baton should be enough."
So she decided to have each can have a retractile tube along with a needle. Everything would be in a belt.
"The schematic is done, now, how do I keep the blood fresh?"
Mei thought the whole day but she didn't have any idea.
Next morning, after a crazy dream about a watermelon playing a violin, Mei got an answer. A piezoelectric to convert vibrations from moving or sound into energy to feed a silent bomb with cooler which would touch each can.
"It's a possible solution, but," she bit her thumb, "crap, I have to call her, to see if what I'm doing works or not, also I need her measures to make the costume."
And thus, Mei was looking for Toga or Izuku in the cafeteria, a strange place where students nurtured and socialized.
Hatsume was about to leave and search in other place, when suddenly, the whole class 1-A got out of a portal on the floor.
"I never get tired of this," commented Mina, while making it to the line, "of course, it's really dark and I think there's something there that wants to posses us. But is an excellent travel method," she finished with a smile.
"You're very manly Izubro for always using such an inusual and scary travel method."
"Thanks, for the lift, Deku."
Izuku laughed a little, "no problem guys."
Then Izuku stopped.
"Himiko, Hatsume is looking for you, she's around that table," he pointed with his finger.
"I'm going Izu," she pouted a little. "But... I'll be back," she imitated Terminator and then went laughing towards the pink haired girl.
"I love that girl," commented Izuku, making all girls from his class, including some others who listened, feel depressed.
Once Toga met with the inventor, she asked for her measures and to later go to the workshop. Himiko took a piece of paper and, thinking in other things, she wrote. Then she gave it to Hatsume, asking her not to think about it until she made it to the workshop.
"And people call me crazy," said Mei when she arrived at the workshop.
Hatsume went back to work and made the costume prototype with the measures, also made the belt with the same material with the steel cans and the graphene cooling system.
When Himiko arrived, she caught Mei who went out the door flying.
"You people should put foam on the doors or the front wall. If not, then put you in a straightjacket," said Toga while getting up. When she had caught her, both of them fell to the floor. "Or maybe put on you a harness, at the minimum."
"There's no time for that, besides, it seems it only happens when someone is passing around here."
"What did you call me for?"
"I have a prototype, I want to check if it works. Enter."
Himiko entered, and after swimming through the sea of spare parts and babies, she arrived at the table where the prototype was.
"I don't mean to be rude, but is ugly," she said when she saw it. It looked like a welder's overalls.
"It's just a prototype, later on I can change the style and dye it whatever color you want," replied Mei. "Put it on and we'll see if it stays on you after you stop the transformation."
Toga took the costume and went to the bathroom, then she came back and asked what to do now.
"Use a needle and take a bit of my blood, don't worry, I put a block on it so it's easier to grab and it also prevents you accidentally pierce someone, it's enough to take blood. Press the left button on a container and take the needle."
Himiko did it and threw the needle at Mei's thigh.
"Now what?"
"You have tube around your neck, put it in your mouth and press the left button and then the right one on the can the needle came from."
"Why two?" she asked while doing what she was told.
"The left one is to free and retract the tube, the right one is to activate a bomb and send the blood to your mouth."
Toga then drank the blood and transformed into Hatsume with her clothes, the only strange thing was that the syringes and tubes could be seen.
"Wow, it has been a while since I looked into a mirror," Mei said while walking around Himiko. "I'm sexy," she smiled. "It saddens me but stop the transformation."
Toga did it and after secreting the substance they saw she still had the costume on.
"Eureka!" shouted Mei, while jumping around screaming.
"Shut up, Hatsume!" yelled Power Loader from somewhere. "I want to sleep!"
"I won't be naked anymore!" shouted Toga.
After calming down and being scolded by Loader for screaming like crazy, both minded their own business. Mei finishing the costume and Himiko training for the exams she had to take to compensate her late entrance to U.A.