Deku: Spirit of Vengeance

Rock You Like A Hurricane

Ochako glared at her three captors, who simply ignored her and waltzed around. Abigor looked over the edge, grinning once he saw the police cars stop in front of the building. "Looks like our audience is here", said Dabi. Ochako took another chance to attempt breaking free, but was noticed by Twice. "Sorry if their too tight. Can't wait to see your boyfriend get beaten!"

Meanwhile, down below, Ochako's classmates were with the police, except for one person. "Where is Midoriya?", asked Iida. "Who cares? Let's get up there and kick some ass!", exclaimed Bakugo. All Might stood beside Naomasa, also noticing that his apprentice was nowhere to be seen. "Tsukauchi, I need to go..." "Find the Midoriya kid? I understand."
All Might flew into the sky, navigating the city from above. He was quite a distance from where the others were when he saw the iconic green fluff of Izuku. The former symbol of peace flew lower, and stopped when seeing his successor encounter a mugger.
"YOUNG MIDORIYA!"
Izuku turned and saw his mentor. "All Might?" "What the hell?", asked the thief. Izuku's head started to feel hot. "A-All Might, you should... go." "Young Midoriya, your girlfriend is in danger, what are you doing out here?" "S-saving her", said Izuku, wincing in pain. "This is messed up. I'm outta here", said the mugger. Izuku looked at his idol. "All Might, what you're about to see should not be told to anyone." "Young Midoriya, what are you talking about?"

Izuku's body became enveloped in flames, and his appearance change. "M-Midoriya?" The said teen, now Ghost Rider, threw his chain to the mugger, wrapping it around his leg and pulling him towards him. The man screamed in terror, before going limp as he stared into the Rider's eyes. Once he was finished, Ghost Rider called his motorcycle. Shortly after it arrived, he jumped onto it. "Ochako..."
He drove off, leaving behind a trail of hellfire.

. . .

"That's our friend up there!", exclaimed Mina. "We're doing the best we can. One wrong move and she could get hurt. This is a hostage situation, after all", said Aizawa. The sound of a motorcycle engine roared through the night, making everyone turn their heads to where it was coming from. Out of the shadows, the Ghost Rider emerged, driving straight to building. Instead of crashing into it, however, he rode up it, leaving everyone else in shock.

Dabi looked over the edge, seeing a figure of flames ride up to him. "He's here." Ghost Rider jumped into the air, before sticking the landing. "Deku!", Ochako called out in joy. Twice shot out his measuring tape at the spirit of vengeance, but it had no effect. He looked at him, eyes burning. "Your soul is strange. It is innocent, then cruel." "What the hell are you talking about! Aw schucks, you're making me feel embarrassed." Dabi tried to shoot out a flame, but his hand was grabbed by Ghost Rider and he was swung over him, slamming into the ground.
Next was Twice.
The tip of the Rider's chain struck the villain's stomach, then wrapped around his waist. He was pulled toward him and punched square in the face, knocking him out. Dabi got up and shot a streak of blue flames. Ghost Rider ran through it and launched his knee into the scarred man's stomach. His face was then smashed into the ground. Both villains were now knocked out. "Why did Blackheart have to waste his time with you two", said Abigor, who flew down to the Rider.
"You're comrade faced me in daytime. Why do you do it at night?" "Because I have a score to settle with the Rider, not his weak human host. And I like a good challenge."

Abigor turned himself into a whirlwind, spinning Ghost Rider around in circles until he was flung off the roof. He swung his chain and launched it at a building, where it penetrated through the wall. The flaming man held onto it while he stood against the side of the building, scanning the area for the wind elemental. "Looking for me?" Above the Rider was a small whirlwind, with Abigor's head on it. He surrounded his enemy, then flew towards another building, smashing Ghost Rider into the wall. Once he was done there, the fallen angel flew him to another building, repeating his earlier action. And so, the Ghost Rider was in a constant cycle of smashing into buildings. Abigor flew to an open space, then spun his captive in a circle for a bit, before shooting him down to the ground.
The people down below stood around the crater, watching as Ghost Rider stood up. He looked at class 1A, making some of them back away in fear, or stand in defensive positions. Much to their surprise, however, he pointed up at the building. "Help her."
Abigor flew down to Ghost Rider, snatching his chain off of him. "Looks like you've got nothing to fight with. Lucky me." He used a strong gust of wind to launch a car at the Rider, where his skull shattered in the process.

The wind elemental laughed. "I can't believe I actually killed the Ghost Rider. I was hoping for more of a challenge." But the Ghost Rider's body stood up, and the shards of bone from his skull levitated up to where his head was supposed to be, repairing itself. Once there was a full skull, it burst into flames. "Now that's interesting", said Abigor. Ghost Rider looked at his classmates again, pointing back up at the building where Ochako was. "GO! Save her!" Abigor flew at Ghost Rider again, this time taking his chain. "Finders keepers."
While the two clashed, the students of UA did as the Rider told and went to save Ochako. Tsuyu jumped from building to building until she reached the top of where Ochako was. "Tsu!" The frog girl loosened her restraints, and the brunette jumped up, seeing her boyfriend having a hard time fighting.
"We have to help him!" Ochako used her quirk on herself and floated down to where her classmates were. Tsuyu joined her. Much to everyone's surprise, the Zero Gravity user picked up a rock and threw it at the Abigor.

"Oh, so you got out?" "Leave him alone!" "Sorry, girl, but the history between me and the Rider doesn't involve me simply leaving him alone."
While the fallen angel was distracted, Ghost Rider jumped onto his back, snatching his chain back from him. After dropping down onto the ground, a geyser of flames erupted from his mouth, blinding Abigor long enough for the Rider to pierce his chain through him. "Your time in the world of the living has reached its end."
Abigor watched in fear as his opponent spun the chain around. He turned into wind to try and escape, but he was pulled back in by the vacuum the chain was making. He felt his molecules being torn apart, and didn't gain a single chance to revert back into his physical form. He screamed in terror as his wind fused with the one Ghost Rider was creating. All he had to do was stop spinning, and Abigor would cease to exist. And that's exactly what happened.
The spirit of vengeance whipped his chain against the ground, bringing the breeze it was creating to a halt.

Ghost Rider looked around, and saw that everyone was staring at him in awe. "Guess we didn't need to help him after all", said Denki. "Ghost Rider, for your vigilante acts, you are under arrest. Come quietly, and this won't have to end in violence", said Endeavor. Ghost Rider only stared at him. Ochako noticed that he was twitching, almost as if he was trying to stop himself from moving. He moved forward for a bit, but stopped, and began to hold his head while shaking around. Before things could get worse, the Rider's bike drove to him, and he hopped on, driving off. "After him!", shouted Endeavor. All heroes and police immediately began to chase after their flaming target.

. . .

Ochako couldn't catch a single ounce of sleep. Izuku still hadn't returned, and she was getting worried. The sun was beginning to rise, meaning that the greenette would soon revert back into his original self.

Ochako jumped when there was a tap at her window, and wouldn't you know it, it was her boyfriend. "Deku!" She opened her window and he climbed in. He looked... scared. "Deku?" "I almost killed him." "What?" "Endeavor. I almost killed him. I could sense every evil thing he's done, and just wanted to kill him. But... I just couldn't bring myself to..."
Ochako took his hand. "Was that what was happening back there? Were you trying to fight for control?" Izuku nodded. The brunette sat him down on the bed and gave him a hug. "It's okay Deku. I'm just happy you're here."
They separated from their hug and shared a loving kiss. "Hey, before this whole incident, you were going to tell me something. Something about you and All Might?" Izuku nodded. "Promise me that you will keep this a secret." "I promise."
The One For All user took a deep breath. "Okay. It all started when I was a kid..."