Chapter 36: The Slip and the Cell
The silver glass floor of the Sanctuary Phasing pocket dimension was usually a place of absolute, unbending stillness. But today, the void was screaming.
Eri sat in the center of a wide, empty clearing within the dimension, her small hands hovering over a withered, dead potted plant Rin had brought her. Rei Arata knelt a few feet away, projecting a calm, soothing aura. The goal was simple: use a microscopic fraction of her Rewind to return the plant to its blooming state.
But trauma was a heavy anchor, and Eri's control was incredibly fragile.
A sudden, sharp memory of Overhaul's sterile operating theater flashed through the little girl's mind. She gasped, her eyes squeezing shut in terror.
Instantly, the small horn on her forehead sparked with a violent, blinding yellow-white light.
"Eri, breathe!" Rei commanded gently, stepping forward.
But it was too late. The Rewind didn't just activate; it detonated.
A massive, expanding sphere of brilliant, destructive temporal energy erupted from Eri's body. The withered plant didn't just bloom; it rapidly reversed into a seedling, then a seed, and then popped out of existence entirely. The silver glass floor beneath her began to hiss and dissolve, the spatial fabric of Rin's dimension literally being unmade by the sheer force of time flowing backward.
"Sovereign, get back!" Kenji yelled, sprinting toward the clearing, his silver Knight's Vow armor igniting.
Kenji lunged toward the temporal sphere, intending to grab the child. But the moment his silver-plated hand breached the yellow light, the indestructible density of his Quirk began to violently unravel. The Rewind was peeling back the cosmic mutation itself. Kenji screamed, his arm going numb, and Giulio had to tackle the Quirkless Knight backward to save him from being erased.
"The density can't hold it!" Giulio shouted, his golden eye wide with alarm. "It is reversing the synthesis!"
Rei gritted his teeth, the cosmic fire in his chest roaring to life. He prepared to use a massive, concussive blast of pure violet energy to disrupt the sphere, but he hesitated. A blast strong enough to break the Rewind might accidentally kill Eri in the crossfire.
The sphere expanded to twenty feet in diameter. Eri was trapped in the dead center, weeping hysterically, her body locked in a state of absolute temporal panic. If she didn't stop, she would rewind herself into nothingness.
"I got her!" a voice yelled from the edge of the void.
Koichi Haimawari didn't wear a tactical jacket or a dark cloak. He was wearing his favorite All Might hoodie, the sleeves rolled up.
He didn't run. He dropped into his signature crouch and activated the Sovereign's gift.
Vector Slip.
A brilliant, frictionless sapphire aura enveloped the vigilante. Koichi pushed off the silver glass. He didn't just slide; he completely repelled the friction of the physical world. He accelerated instantly to near-teleportation speeds, a blur of blue light rocketing directly toward the expanding yellow sphere of death.
"Crawler, stop! It'll unmake you!" Akio screamed.
Koichi didn't stop. As he hit the boundary of the Rewind sphere, he concentrated entirely on the repulsive force of his mutation.
He didn't try to overpower the time-dilation like Kenji had. Instead, Koichi used Vector Slip to literally slide between the temporal frequencies. He repelled the Rewind energy away from his skin, his sapphire aura acting like a perfectly frictionless hull cutting through a stormy sea.
The yellow light washed over him, but it couldn't grip his cells. There was no friction for the time-reversal to latch onto.
Koichi glided into the dead center of the sphere. He reached out and wrapped his arms securely around the weeping, terrified little girl.
"I've got you, Eri!" Koichi yelled over the roar of the energy, his voice lacking any fear, filled only with the warm, dopey heroism of a guy from Naruhata. "You're safe! I'm catching you!"
Koichi didn't try to pull her out immediately. He just held her. The frictionless sapphire energy cocooned them both, shielding Eri from her own violent feedback loop.
Feeling the warm, safe embrace, Eri's panic finally broke. She buried her face into Koichi's hoodie and sobbed.
The blinding yellow light flickered, sputtered, and finally collapsed into a few harmless sparks. The horn on Eri's forehead shrank back down. The Rewind was contained.
The Vanguard let out a collective, massive breath.
Rei walked over, his silver mask reflecting the fading blue light of Koichi's aura. He looked at the vigilante sitting on the floor, gently rubbing the little girl's back as she cried herself to sleep in his arms.
"You didn't fight the storm, Crawler," Rei said softly, profound respect lacing his dual-toned voice. "You simply slipped through the rain. You are exactly what she needs."
Koichi looked up, offering a shaky but genuine smile. "I told you, Sovereign. I'm just here to catch the people who fall."
While the Swarm found its guardian, the walls of UA High School felt like they were closing in.
Izuku Midoriya sat on the edge of his bed in the Heights Alliance dorms. His room, plastered with All Might posters, suddenly felt suffocating. The broadcast of the Commission President ordering the Symbol of Peace's execution was playing on a continuous, agonizing loop in his mind.
But worse was the memory of the alleyway. The Sovereign. Shinso. And Aoyama—his flamboyant, friendly classmate—standing proudly in the ranks of the underworld's most dangerous faction.
BOOM.
The door to Midoriya's dorm room was violently kicked open, splintering the wood.
Katsuki Bakugo stormed inside, his crimson eyes burning with unadulterated fury. Tiny, aggressive explosions popped across his palms. Right behind him, stepping carefully over the broken doorframe, was Shoto Todoroki. The dual-wielding hero's expression was an unreadable mask of cold calculation.
"Deku," Bakugo snarled, slamming the door shut behind Todoroki. "You're going to tell me exactly what the hell is going on. You've been muttering to yourself for two days. You were in Kamino. You saw that winged freak. What do you know?"
"Kacchan, I..." Midoriya stammered, his hands shaking. "It's... it's bigger than us."
"Spit it out," Todoroki said evenly, crossing his arms. "The Commission is corrupt. We all saw the broadcast. But you know something else. Who is the Sovereign?"
Midoriya looked at his two greatest rivals. He couldn't lie to them. They had fought Stain together. They had survived the forest together.
"He's... he's the one handing out Quirks," Midoriya whispered, staring at the floor. "He's leading the Vanguard. And... Aoyama and Shinso are working for him."
Bakugo froze. The explosions on his palms died instantly. "What did you just say?"
"Aoyama?" Todoroki frowned, his mind racing back to the training camp. The sudden, impossible mastery of the Navel Laser. The golden flight. "The sudden Quirk awakening. It wasn't natural. It was a gift from the Sovereign."
"They're a rogue faction," Midoriya said, his voice rising in panic. "They operate entirely outside the law! But they saved Kamino! And the Commission tried to kill All Might! I don't know who the good guys are anymore!"
Bakugo grabbed Midoriya by the collar of his shirt, hauling him to his feet. "Listen to me, you damn nerd! I don't care if the Commission is a bunch of lying suits. We are going to be heroes! We don't hide in the shadows like cowards!"
Midoriya's phone buzzed loudly on his desk.
The sudden noise caused Bakugo to drop him. Midoriya scrambled to pick it up. It was a single, encrypted text message.
Bring Bakugo and Todoroki. My office. Now. - Aizawa.
The three boys exchanged a heavy, loaded look. Eraserhead never summoned them like this.
Ten minutes later, the Origin Trio stood in the dimly lit office of their homeroom teacher. Aizawa sat behind his desk, looking completely exhausted. The scars on his face were a stark reminder of the violence they had all just barely survived.
Aizawa stood up. He walked to the door, locked it, and flipped a small switch on his desk. A low, humming frequency filled the room—a high-grade audio jammer.
"Sit down," Aizawa commanded.
Midoriya, Bakugo, and Todoroki took the three chairs across from the desk, rigid with tension.
"You all saw the broadcast," Aizawa began, his visible eye dark and serious. "The Commission is compromised. The public has lost faith. The 'Golden Age' is over."
"Sensei," Midoriya blurted out, unable to hold it in. "Aoyama... Aoyama is with the Sovereign! We have to do something!"
"I know," Aizawa replied flatly.
The three students stared at him in absolute shock.
"You know?" Bakugo demanded, his voice dangerously low. "You know there's a spy in our class, and you haven't expelled him?"
"I haven't expelled him, Bakugo, because three days ago, that 'spy' fed the Pro Heroes the exact intel needed to corner All For One and save your life," Aizawa shot back, his tone brokering absolutely no argument. "The Sovereign is dangerous. He is operating illegally. But right now, his Vanguard is the only force capable of moving fast enough to stop the bleeding. The Commission wants to cover up their crimes, and the villains are preparing to exploit the vacuum."
Aizawa leaned over his desk, looking at his three most capable, problematic, and powerful students. He saw Midoriya's unyielding heart, Bakugo's explosive drive for victory, and Todoroki's cold, pragmatic power.
"I am officially aligning with a faction of Underground Heroes," Aizawa declared, the weight of the shadow war settling onto his shoulders. "We are operating outside the Commission's oversight. We are going to work with the Vanguard when our goals align, and we are going to keep them in check when they cross the line."
Aizawa pointed a finger at the three boys.
"The villains are evolving. If you three stay in the light, the Commission will turn you into their obedient lapdogs, or the League will slaughter you. I am not going to let either of those things happen."
Aizawa pulled a heavily encrypted, black burner phone from his drawer and slid it across the desk toward Midoriya.
"I am forming an Underground Student Cell," Eraserhead stated, his eyes locking with Midoriya's. "You will train harder than anyone else. You will learn to fight in the dark. And when the war truly begins, you will be my strike team. Do you understand?"
Bakugo smirked, a fierce, feral grin spreading across his face. "A secret strike team? Finally, something that isn't a damn school festival."
Todoroki nodded slowly. "I'm in."
Midoriya looked at the black phone. He thought of All Might's fading embers. He thought of the Sovereign's violet wings. The world was no longer black and white. It was gray. And he was ready to step into it.
Midoriya picked up the phone. "We're with you, Sensei."