Satsuki looked at the contraption called a helmet. "What is this?"
"The Sci-Fi Club, not to be confused with the Science Club, created this device to alter one's mind." Inumuta answered. "I'm afraid they were going to use it on you."
"And you dealt with them." Satsuki concluded. She picked up the helmet, examining it closer. "So why did you want to show me this? It does not interest me."
"Well, Houka here figured we could use it on someone like Ragyo, though we probably have better luck messing with Matoi's mind." Uzu shrugged. "Personally, I'd rather leave Matoi as she is. I still want to fight her."
Satsuki scoffed. "We do nothing to Matoi. She's as pathetic as sh-"
Satsuki lit up like a lightbulb, the helmet humming and screeching. Without hesitation, Gamagoori whipped the helmet out of her hands and Uzu caught it with the tip of his kendo stick, but it broke through the metal. "Huh?"
Nonon immediately went to check on her friend. "Lady Satsuki, are you alright?"
"Don't worry, I'm fine." Satsuki got up, went to her throne, and curled up there. The Elite Four looked at each other.
It was Gamagoori who broke the silence. "To the Mankanshokus."
Ryuko knew something was off when that helmet shocked Mako. First of all, Mako did not smile. "Mako, are you alright?"
"It is...tolerable." Mako stood up, light shining through the window as she turned to look at Ryuko. "What possessed you to use your blade to remove my helmet? You could have hurt me, but most importantly, you could have hurt yourself! Don't you think these things through?"
"Hey! I stopped it, alright? Geez, you sound like...like..."
At this point, the Elite Four burst through the door. "Emergency Meeting! Did you encounter the Sci-Fi Club?"
Ryuko blinked. "Um, yeah. They were going to experiment on Mako. We just got it off, but then it started shocking her."
Gamagoori glared at the girls. "Where is the helmet now."
"Oh, I cut it off." Ryuko told him. "And then you stepped on it."
Gamagoori bent down and stared at his feet. "Oh no..."
"Don't worry, we can always rebuild another one." Satsuki cheerfully told him. "It's not like the Sci-Fi Club is an actual Science Club, so it can't be that hard to build."
Ryuko blinked. "Hey, why is she acting like Mako?"
Inumuta pushed up his glasses. "So the theory is correct. The Sci-Fi Club created two sets of helmets that would switch the personas of the users. It seems only to affect their personalities and not their memories. Unfortunately, it seems that both helmets are in need of repair."
Ryuko grabbed him by the collar. "So fix it!"
"This was a secret project by the Sci-Fi Club that began since the school was built three years ago. Neither we nor Lady Satsuki were aware of this project." Inumuta deadpanned. "Besides, the Club President had meant to use it on Lady Satsuki, so it will take time to get accurate information from him."
"Because..."
Satsuki saw dinner on the table. "Oh! Food! Mrs. Mankanshoku, can I?"
Mrs. Mankanshoku barely nodded when Satsuki shovelled the mystery croquettes into her mouth. Mako shook her head. "How can the Student Council President eat like a pig?"
"Chew slowly." Gamagoori resumed his speech. "Because you destroyed the other pair, we have to built the helmets from scratch and ensure they work properly. Our choices is to hope they act like they did or for them to dress up like each other, and we will not take the second option."
Ryuko did not notice that Satsuki began choking, though it seems Guts was giving her the Heimlich Maneuver. "Why not? Afraid to trust Mako with that Kamui?"
"It's...There are some details that no impersonator can copy." Nonon quickly said, rushing to Satsuki and forcing the potato and bone out. "Lady Satsuki, are you alright?"
Ryuko looked at Mako. It seems that she was paying attention to the conversation, which was good, but it wasn't like her at all. "Fine, but I'm doing this for Mako."
((Basic personality swap. Couldn't figure out how to do Ryuko this way, so went with the most serious character and the most comical character in the anime.))