Beautiful Villian (Katsuki BakugouXReader(female)

Back-Stabber pt.1

So I know in the show it had only been a week before they went to USJ, but for the sake of plot, in this story it had been months. (-.-")~ p.s. some events are altered for creative writing.
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The plan was set. You knew by heart the part you'd play. Today was the day. Boss Tomura had told you to come down to the bar for prep and to show something. You arrive late the night before, greeted by a group of Villians you barely knew.
"Yan. Now that your here, I'll show you the ace up our sleeve!" Tomura looked too excited, with an ugly grin behind the hand mask. He waved to the dark hallway, and the biggest form you'd ever seen come forth. "It's gross." You state plainly. The monster was 7ft tall, muscular, with an ugly duck face.

Tomura ignored you as he turned on a television. A dark form appeared, Tomura called him master. You were stunned, all this time you were in the League of Villians you'd never heard of the true leader of the group. "Tomorrow is the day the symbol of peace dies, with these Nomu will do it." A collective agreement echoes from Villians in the room. "Ah, and you must be the girl I heard so much about." You gulp and bow. "Yes sir." He laughs softly at your manners. " you've done well, don't disappoint us, Yan." Him saying your name made you sick with fear. "Of course."
No turning back, you thought. This man is serious business just his presence made you terrified. With that, the meeting was adjourned. Everyone knew their jobs.
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"Yan! Here we go aren't you excited?" Exclaimed Kirishima. His eyes were practically sparkling, no, the whole class was excited. You had sat on the bus next to Bakugou and Kirishima. Bakugou had been excited over texts, but here he was an angsty ball of rage.
-such a tsundere-
you thought to yourself, trying to smile. You arrived at the building all too early, no sign of All Might however. -shit, where is he?!-
You must have looked panicked because Bakugou sneakily squeezed your hand. You look up at Bakugou, he gave a small smirk. The bus came to a stop and with that everyone in their hero uniforms rolled out, you made sure to hang back, no one noticed, not even Bakugou. A pro hero named 13 was giving directions on the activity, but all you did was look at exits, and noting how many heroes and students were present, yet still no All Might. You were looking at Bakugou now, he seemed as excited as everyone else now, then you started to walk towards him.
-I have to tell him- you thought, it's not too late right?
Just as you reached Bakugou, a blast of Black erupted into existence. It's Kurogiri. The pro hero activated his quirk, but it backfired. 13 hurt himself. Kirishima and Bakugou ran forward at Kurogiri before you could stop him. He teleported everyone to different areas where you knew villains were waiting for them.
-it's too late- Bakugou was gone, along with everyone else. There's no going back.
"Yan, it's time." Kurogiri encouraged. I turn around to look at my classmates that were left with Aizawa-sensei and 13. They all looked at me confused. Then more portals poured out with Tomura, Nomu, and more villains. Before you or Kurogiri could react, Aizawa went straight towards the center to fight Tomura.
"Kurogiri, I'll protect Tomura, keep them from leaving!"
You start to run after Aizawa, he was fast! He had already taken out several Villians already. You knew he'd cancel out your quirk so had to rely on your fighting style. He had never fought you so maybe you could catch him off guard. He was making quick work of the hordes of villians. As you sprint towards him, you slid to catch his feet from behind, but he's already in the air, Tomura comes running forward, hand extended. It meant death for sure, you dive again for his legs, holding on for dear life. His quirk was Lessing from fatigue, he couldn't kick you off. "Y/n what are you doing!? Why!?" Tomura closes in for the kill. Aizawa braces himself, Tomura starts to disintegrate Aizawa's elbow. At the last second he kicks you off, being able to punch Tomura and knock him down. All of sudden a Nomu blocks his next attack on Tomura. The Nomu begins to just destroy Aizawa, sickening cracks could be heard as it broke his arm and smashed his face over and over. Looking at Tomura you go stand at his side. "Boss, All Might isn't here. I'm not sure if he'll come." Tomura waves his hand dismissively. "Not to worry, if we kill enough students then he'll show, so go. Kill your fellow classmates." Without hesitation you sprint off towards Bakugou's explosions.