Ok so please tell me if this doesn't make sense and help refine this i tried to make it as best i could and simplify my idea. So I'm open to feedback, just don't be an ass and say this doesn't make sense and leave it at that. If you want to try and help explain it better I'm open to opinions.
Other then that i hope yall enjoy
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Chapter 31: Understanding
The next morning, Cid arrived at the agency's private training room exactly on time. The large, reinforced chamber was stark and utilitarian, high ceilings, padded walls, and a wide open floor marked with measurement grids. Sir Nighteye was already waiting, standing with perfect posture beside two simple metal chairs he had pulled into the center of the room.
No weapons. No combat dummies. No sparring setup.
"Sit," Nighteye said, gesturing to one of the chairs as Cid approached.
Cid raised an eyebrow but complied, dropping into the seat. Nighteye took the other chair, crossing one leg over the other and folding his hands in his lap. His sharp eyes studied Cid for a long moment before he spoke.
"Before we do anything physical, I want you to explain your Quirk to me. In as much detail as you can. From the beginning. How it started, how it has changed, what you believe it can do now, and what limitations you have observed. Do not hold back or simplify."
Cid leaned back slightly, thinking. He had never really broken it down out loud like this before to analyze it.
"Alright," he said slowly. "At first, it was simple. I could change the size and shape of anything I could see clearly. Shrink or expand objects, people, even parts of them. The bigger or more complex the target, the harder it was and the more it drained me. Line of sight was required, but I later found out that touch worked as well. I could make something the size of a building small enough to fit in my palm, or expand a pebble into a wall. Then there is the physical mutation part of it, my eyes have enhanced processing speed, analyzing anything, trajectory prediction and mapping out weak points."
He paused, then continued.
"During the USJ attack… I got pushed to my limits and almost died. I was bleeding out and I kept trying to shrink the wound to close it but couldn't get it to work at first. Then something inside me just… shifted a small bit and it shrank. after I dealt with the villain, I saw…. something else that made my powers fully unlock. My other eye changed and afterwards I was able to manipulate and see the distance between points, I think it messes with space. I can shrink the distance between me and a target so I basically teleport, or expand it to create distance. I can pull people or objects across a battlefield instantly."
Nighteye listened without interrupting, his expression unreadable.
Cid kept going, trying to be as precise as possible.
"My right eye still handles mass and physical shape. The second eye seems to handle distance. They feel connected now, like they're two halves of the same ability, but I haven't fully figured out how to combine them yet."
Nighteye remained silent for a few seconds after Cid finished, then finally spoke.
"Is your ability strictly line-of-sight, or does touch also work for the spatial manipulation?"
"Both," Cid answered. "Touch makes it easier and more precise. Line of sight works for bigger or farther targets, but it's not required if I can feel the connection."
Nighteye nodded once, slowly.
"I believe you have the majority of it covered," he said. "But not all of it."
Cid frowned, confusion clear on his face. "This is my Quirk. I know it better than anyone."
Nighteye's gaze was steady and analytical.
"Your first eye controls the size and shape of matter. Your second eye has so far only demonstrated control over distance. I find it unlikely that one eye operates two abilities and the other only handles 1. I suspect there is one more core ability you have not yet discovered or at least not consciously accessed. The human eyes were always meant to work in tandem to see the bigger picture. From the very beginning, your Quirk was built the same, for detailed control, not just the large, dramatic effects you have been relying on."
Cid sat there, processing. The idea that there was still more left him momentarily speechless due to how much it made sense.
Nighteye leaned forward slightly, voice calm but firm.
"You need to figure out what that missing piece is. And you need to learn to use both eyes for their true purpose. Not just shrinking buildings or jumping across battlefields. True mastery will come from understanding the smallest interactions between all your abilities and then build on it."
The training room fell quiet as Cid stared at the floor, mind already turning over Nighteye's words.
Nighteye decides that they had done enough theory for now.
"Enough theory for now. It is time to experiment. I want you to use your quirk and explore it, figure out the limits and stress test them."
He gestured to the open space in front of Cid.
"Pick a single point in the air, nothing physical, just empty space. Try to edit the distance between yourself and that point. Start as small as you possibly can. A centimeter. Half a centimeter. Use both eyes. Watch what happens. Study it. Figure out why it happens. Understand it."
Cid blinked, then nodded slowly. He sat up straighter in the chair and focused on a point in the air about 3 feet in front of him in the empty spot in the training room.
He activated both eyes. The intricate star patterns glowed faintly behind his irises as he concentrated.
At first, nothing visible happened. He tried shrinking the distance, willing the space between himself and that point to collapse. The air shimmered slightly, but the effect was tiny, barely noticeable.
Nighteye watched intently.
"Smaller," he urged. "Do not think in broad terms. Think in mechanisms. The more you understand how it actually works, the clearer your idea will become of what is and isn't possible."
Cid narrowed his focus. He tried again, this time on an even tinier scale, just a few millimeters. He watched studying the way the air warped and bent. He could feel the strain, the subtle push and pull of his Quirk interacting with… something foreign to him not physically like matter, but more loose and less coherent.
He kept going, repeating the exercise over and over, adjusting the scale smaller and smaller each time. Minutes passed in near silence, broken only by Nighteye's occasional calm prompts.
"Watch the distortion. Feel the difference between the two eyes. One controls matter. The other… think what could it do, feel the difference in the effects?"
Cid's brow furrowed. He tried again, pushing harder. The point in the air suddenly flickered. The space between him and that spot compressed so tightly that for a fraction of a second it looked like the air itself had folded and glowed bright blue, then dissipated.
He paused, eyes widening as something clicked.
"I'm not… messing with distance," he said slowly, almost to himself. "I'm manipulating space. I'm unconsciously shrinking the actual space between me and my target."
Nighteye's lips curved into the faintest hint of approval.
"Exactly. You have been treating it as a shortcut, collapsing distance like a teleport. But that is only a surface application. Your second eye is capable of far more precise control. The true power lies in directly altering the fabric of space itself, its density, its shape, its curvature. That is what the eye was always meant for."
Cid stared at the empty point in the air, mind racing as the realization settled in. The first eye changed the shape and mass of matter. The second eye changed the shape and density of the space that matter occupied.
It wasn't two separate powers.
It was one complete system.
-Later-
After nearly fourteen straight hours of relentless training, Cid was slumped in the metal chair, drenched in sweat. His chest rose and fell in shallow, labored breaths. Both eyes were closed tight, the intricate star patterns gone. His body trembled with exhaustion and his muscles twitched from the constant mental and physical strain.
The training room was silent except for the low hum of the ventilation system and Cid's ragged breathing.
Nighteye finally spoke, his voice calm but firm. "That's enough for today. We'll continue tomorrow. Good job."
Cid didn't move for a long moment. Then he forced his eyes open, pushed himself up on shaky legs, and gave a single, exhausted nod. Without a word he turned and headed toward the locker room.
The hot shower helped a little, but the splitting headache that had been building for the last few hours refused to fade. He dressed slowly, pulling on fresh clothes, then stepped into the hallway with one hand pressed to his temple, eyes half-lidded against the bright lights.
He barely registered where he was going, just shuffling forward on autopilot.
"Whoa, you look rough!"
A bright, familiar voice snapped him out of his haze. Mirio appeared from around the corner, his usual wide grin in place. Before Cid could respond, Mirio looped an arm around his shoulders and started steering him down the hall.
"Come on, you need food. The lounge is this way."
Cid was too tired to argue. He let Mirio guide him to the agency lounge, where the third-year dropped him into a bean bag chair and quickly returned with two trays of food. Cid ate mechanically, barely tasting anything, then flopped back into the bean bag with a heavy sigh. He draped one arm over his eyes, burying them in the crook of his elbow to block out the light and let out a groan.
Mirio dropped into the chair across from him and immediately started chatting, completely unbothered by Cid's near-silence.
"Man, Sir Nighteye must really see something special in you. He's normally intense, but not this intense. I've never seen him push anyone like that, let alone on the first day. He must really believe you've got the potential to go far. That's a huge compliment, you know?"
Mirio kept talking, cheerful and easygoing, filling the silence without needing much input. He was used to carrying conversations with Tamaki on a daily basis, Cid was practically talkative by comparison.
After a while Cid slowly lowered his arm, squinting against the light as he looked over at Mirio.
"…Thanks," he said quietly, voice rough from exhaustion. "For telling Sir Nighteye about me. I know you didn't have to do that. I mean it, thanks man."
Mirio's grin widened. "No problem at all! You looked like you needed a real shot. Glad it worked out."
Cid gave a small, tired nod and leaned his head back again, eyes closing once more. It really hit him how good a guy Mirio was. 'Heh, I guess he's just like that. I'll have to pay him back one day' Cid thought. A small smile made its way across his lips as Mirio's cheerful voice kept going along beside him.