Kaito shimizu always saw the world as one big math expression. One expression that sadly never had a solution. The world, with all its inefficiencies and problems couldn't find itself one solution, not one. That line or two of thought has botherd him since he was 4, when he first starting showing signs of a quirk.
It started as something small, him moving a bit faster, remembering things you wouldn't think a four year old could, scraping his knee, with not a single tear falling down his face. His parents though it was normal, thought their kid was just smart. But when Kaito fell and broke his arm, with not a single cry of pain being let out, they realized that it might be a quirk.
The visit to the quirk doctor was scheduled right after doctors released after putting his arm in a cast, his parents trying to console an expressionless child. Taking his hand Yumma, his mother, took him to the quirk doctor that resided at the hospital.
"Yes, it definitely seems like your son has awakened his quirk. My best quess is that this expressionless form you see your son in right now is the passive use of his quirk." The balding, middle aged doctor spoke somberly. "This affect could change as your son gets better control, his quirk seems to be more pronounced than others his age I've seen," the doctor says to change the topic from Kaito's quirk 'drawback', "What did you say where the times you think he was using his quirk?" The doctor asks hoping to gauge his quirk.
"Well… we first started seeing signs around a month ago when he ran unnaturally fast around the park," Yumma looks to her husband, reviving a nod in return, "Then we really noticed when he didn't even react when he broke his arm." She finishes, looking down at her sons casted arm.
The doctor nods before speaking again, "And from your records," he takes out a clipboard, lifting a page or two up, " you both have quirks centered around numbers correct?" He looks towards the two other adults in the room.
"Yes that's right," the husband speaks up at last, "my quirk is measurement, I'm able to immediately tell the exact Messurment of anything as soon as I think about it." The doctor focuses on him and then switches his gaze to the woman sitting beside him.
"My quirk lets me reduce anything I can put my mind too, but the drawback is heavy, causing large mental strain on me. So I'm only able to do reduce small objects, or constructs" The doctor nods after hearing both quirks spoken to him.
"Very powerful quirks, your son seems to have taken the best of both of your quirks and has ended up with something stronger." The doctor lets the family catch up to his explanation. "He seems to be able to multiply and divide certain things," the doctor adds before finishing explaining, "As you've told me he ran far faster than the average four year old, and eased the sensation of pain." To proof his statements the slapping of paper against a desk fills the room.
"Your sons medical reports indicate that it wasn't a simple fall that broke your sons arm, it was your son unconsciously using his quirk to multiply his muscle mass which ended up snapping his bone under the pressure of the new added muscle." The doctor finishes by dropping the bombshell of a reveal to Kaito's parents.
A stunned silence fills the air as the parents see the evidence to prove the doctors claim. Eventually stars fill the eyes of the parents as they come to terms with this realization.
"That's wonderful honey! Aren't you excited for the opportunity's this will bring?" Yumma says excitedly to her husband.
"One more thing," the doctor interrupts the excited shouts bringing the attention back towards him, "We need to go over your sons quirk name,"
An emotion finnaly crosses the wall that was Kaito's young face. One of curiosity, "Equation seems like a fitting name" the child says in a monotonous voice.
"Equation… huh, surprised that word is in your vocabulary young man, very well." The doctor types away at the computer screen at his desk. He flips the screen around a shows the family a identification document. Both parents and child looking it over.
Subject: Kaito Shimizu
Quirk: Equation_
He flips the screen back around and presses the done button.
"From now on, Kaito Shimizu's quirk will be known as, Equation"
The car ride home want anything extraordinary, just another number to add the the countless times he's been in the vehicle. The reveal of a quirk did stir something in him, but it wasn't excitement, not exactly. To the young Kaito who has barely started learning basic math, a quirk based around the concept intrigued him, lit a candle under that path of ambition so to speak. He resolved that when he returned home he would research as much as he could about math on the family computer.
Suddenly trafic stopped, and a rumbling explosion was heard tens of yards away. Panic struck both parents sitting in their respective front seats of the car as the frantically looked around for the source of the noise.
A blur of motion attracted the eyes of many people still trapped in their cars on the highway. A man in spandex appeared floating in the air overhead.
"Condiment king, your reign of terror ends here!!!" A deep booming voice echoes across the highway.
A man appeared opposite the floating man wearing black spandex with 3 bottles filled with red, green, and yellow liquids. "Not if you fall before I! Condiment King! The onlookers deadpanned at the seemingly un-threatening act.
That is until he sprays the liquid from his pouches from a canon contraption in the shape of a gun onto a car filled with a family of four, gradually melting through and eating away at the flesh of the people inside. Much to the horror of the countless people still watching.
All it took was one scream before all hell broke lose and trafic was started again. As people were desperate to escape. Kaito scoffed at the inefficiency of the spandex wearing 'hero' wasting time by trying to talk with the villain.
That was when Kaito realized, the world around them was filled with them. 'Inefficiencies' . That was when another flame, brighter than his curiosity, a resolve to find a solution to the expression that is the world. Solving the problem that is humanity.