Next day there was rare gap in the physical training.
The students sat in the classroom.
The walls were covered in pulsating, translucent screens showing the microscopic inner workings of the human body where long very thin fibers were everywhere in the body along the neurons in the bones and all the other places.
At the front of the room stood Teacher Elena, the Academy's leading expert on fiber control.
She wore a suit made of "smart-fiber" that changed color based on her own emotional resonance.
"Thousands of years ago," Elena began, her voice soft but commanding.
"The human brain was a biological dead end."
"It could process logic, emotion, and basic survival, but it was limited by the speed of chemical signals."
"We were trapped in three dimensions because our hardware simply couldn't see any further."
She tapped a sensor, and a giant holographic projection of a primitive human brain appeared next to a modern one.
"Today, we are different," she continued.
"The fibers are not just energy; they are biological receptors."
"They stay close to your neurons, weaving into your very DNA."
The students watched in awe as the hologram zoomed in on a single neuron.
They could see the delicate fibers wrapped around the nerve endings like glowing vines.
"Because these threads act like electrical conductors," Elena explained.
"We have been able to develop a secondary memory storage and processing unit in our own body."
"Your fibers are not just for fighting."
Elena made pointed eye contact with Jax, who still had a slight tremor in his hand from the fight the previous day.
"It's for processing. It works like a biological processor."
"However," Elena's voice turned grave, "do not confuse calculation with understanding."
"Think of it like the complex numbers from ancient mathematics."
"We could use them to solve equations, but the human mind could never truly visualize an imaginary number."
"Your fiber can computes the 11-dimensional Fold because it has the raw processing power."
"But your conscious mind? It is still tethered to a 3D perspective."
"This is the greatest challenge humanity faces."
"We can calculate things, but we cannot yet understand the its meaning."
Elena tapped her console, bringing up a schematic of the human torso and its internal cavities.
"The research in this field is incredibly active right now," she hinted, her eyes sparking.
"Advanced mages are learning to utilize the natural cavities in the body to house more fibers for processing information. External methods like using magic card is use of fibers externally to process and act fast."
"By creating fiber loops within the thoracic and abdominal voids, we can power these fiber-based processors."
"The topography of these networks. The link between your brain, fiber processor and memory is the next frontier."
"Some elite mages are even creating biological processors for the whole squad."
"A group of soldiers can link their fibers to process all surrounding data together as one mind."
"This collective processing makes it nearly impossible for an enemy to catch them off guard."
Kaelen listened intently, his mind racing back to the Compute Chips and Boolean Logic of his previous life.
While this world used similar concepts, their hardware was so powerful they didn't need tricks.
They didn't use special data architectures because their raw power was enough to brute force most problems.
If I can combine the optimization tricks from my old life with the raw power of this world, Kaelen thought.
If he applied his knowledge perfectly he may even be faster then others.
He began to visualize a new book in his mind. A manual for building a biological supercomputer.
He mapped out how to link his biological processor to his memory storage and brain.
"Teacher?" Mina raised her hand.
"If we can compute it but not understand it... is that why the Void Reapers drive people mad?"
Elena nodded slowly.
"Madness occurs when the fiber tries to force the conscious mind to see what it can only calculate. Void Reapers are 4 dimensional beings hard to see for us so brain begin to malfunction."
The lecture ended, leaving the students in a state of quiet reflection.
"I feel like my head is heavy," Leo muttered, rubbing his temples.
Kaelen stayed silent, already planing what he should do next.
While the rest of the class was adapting to the X-1 Serum with standard lean muscle growth, Kaelen's body began to react in a way that left the academy doctors and his friends in a state of total shock.
The anomaly was the number of fiber his body is producing and there lengths.
Kaelen's red fibers were growing rapidly.
Because of the Veyron family's DNA and the advanced computing capability inherited from his mother, his fibers were finding the most efficient way to grow.
The mana storage capacity of Kaelen's body was now ten times that of a normal student, but there was a visible cost.
His biology, acting on the super computing commands of his brain, realized his small frame couldn't handle a these much fiber.
To protect his organs from the massive mana, his body began to expand.
Within weeks, Kaelen had shot up in height becoming the tallest in his year but he had also become, as Leo put it a planetary object.
He was round, soft, and incredibly large.
The lean, sharp eyed boy from the first year had been replaced by a giant, chubby, and comically cute version of himself.
Kaelen stood in his mother's office in Veyron Tower, looking at himself in a full length mirror.
He looked like a little giant, adorable ball.
His uniform was specially modified with auto stretch fibers just to keep from bursting.
"Mom," Kaelen said, his voice a bit muffled by his now-chubby cheeks. "I'm... I'm round. I'm literally a circle. I can barely see my toes."
Lyra Veyron walked around him, a digital scanner in her hand, but she wasn't frowning.
In fact, she looked like she was struggling to hide a smile. She reached out and pinched his cheek. "Oh, Kaelen, you're just so... adorable!"
"I'm a Veyron, Mom! I'm supposed to be intimidating!"
"And you are!" she insisted, though she poked his round tummy, which let out a soft thump.
"Your fibers are growing exponentially. Your body trying to handle the burden."
"You aren't 'fat,' Kael. You're a mana battery now. You just happen to look like a very huggable battery."
When Kaelen come back to academy for the 5x Gravity session, the room went silent for three seconds before Leo burst out laughing.
Even Mina, who usually tried to be respectful, had to cover her mouth with her hand to hide her giggling.
"It's... it's a very nice look, Kaelen," Mina said, her eyes twinkling. "You look very... soft. But also very sturdy?"
However, the laughter stopped when the gravity turned on.
While the other students were struggling to stay upright, Kaelen didn't even wobble.
His massive, round body acted like a body of an elite mage.
Because his mana was compactly packed, the 5x gravity felt like a light breeze.
He simply sat down looking like a large, red tinted boulder and began his fiber stretching and weight training as if nothing was wrong.
Teacher Andrew walked over, looking at Kaelen with an expression that was half amused and half impressed.
"The number of threads is what's doing it. He's reaching a state of mana-mass equilibrium."
"He's obese by human standards, but in terms of fibers, he has the most perfect body."
Despite everyone was making fun of him, Kaelen noticed something.
When he moved, there was more energy in his body. He was like a giant, chubby powerhouse.
"I'm not changing back anytime soon, am I?" Kaelen asked his mother later that evening as she happily fed him high nutrient treats.
"Not until you reach Master Fiber Realm and can start Yarn making process" Lyra said, hugging her now very cute son.
"But why would you want to? You're the cutest fiber mage the Core has ever seen. Everyone wants to be your friend now just so they can use you as a pillow!"
Kaelen sighed, a small ripple going through his round frame.
He was a mana battery in the body of a giant teddy bear.
It wasn't the "heroic" look he had imagined, but as he felt the sheer power humming inside his chubby chest, he decided he could live with being "comical" as long as he remained unstoppable.
Later that night, the group gathered once again in the dormitory lounge.
Kaelen occupied nearly half of the largest floating sofa, his massive, soft frame making the anti-gravity cushions work overtime.
While they were talking, he noticed Mina looking at him with an expression of intense curiosity and hesitation.
"What is it, Mina?" Kaelen asked.
Mina fidgeted with her silver-lined sleeves, her face turning a soft pink.
"Kael... can I... come near you? And maybe touch?"
Kaelen was stunned for a moment.
He looked down at his round, plush arms and sighed with a wry, self-deprecating smile.
"Okay, you can touch. I'm basically a giant cushion at this point anyway."
Mina slid across the sofa, her movements cautious until she reached his side.
She tentatively poked his shoulder, expecting the hardness of a weightlifter, but instead found a texture as soft as a cloud.
As she leaned in further, she realized his body was incredibly warm and comforting.
Overwhelmed by how cozy he felt, she let out a tiny sigh and leaned her head against his shoulder.
It was a picture perfect, adorable scene. The round big brother figure looking down with a confused but gentle expression, while the petite, silver haired girl nestled against him like he was a premium heated pillow.
Kaelen continued talking to Leo and Sora about the day's training, but after a few minutes, he felt the weight on his shoulder becoming a bit too comfortable.
He reached up with a thick, soft finger and gently poked the top of Mina's head.
"Mina, don't just lie there," he murmured, trying to sound stern but failing because of his round cheeks.
Mina pouted slightly, her silver aura flickering with a hint of disappointment, but she reluctantly sat back up beside him.
Leo just shook his head, grinning. "Face it, Kael. You're the House Ignis mascot now."
After the group finally dispersed for the night, Kaelen returned to his private hive.
The heavy thud of his footsteps echoed on the metallic floor as he moved toward his desk.
Despite his massive size, his hands remained surprisingly precise.
He pulled out his physical notebook.
He took his sharpened pencil, the graphite tip gleaming under the amber lights, and began to sketch.
He wasn't just drawing lines; he was trying to draw his secondary neuron system using fiber to make himself twice as fast and also where to make his biological processor and memory in the body.
As he wrote, the scratch of the pencil on paper helped him focus his thoughts.
He might look like a giant teddy bear on the outside, but inside, he was full of fibers that can be used for various nice ideas.