Aizawa, the man Sans respected out of the many power houses in this world, was pressed down against the floor, surrounded by many unconscious and beaten up people. On his back sat a man, or some sort of creature, so tall even All Might was considered short in comparison. This guy wasn't going easy on Aizawa, either, having twisted one arm so far back the bone was obviously broken. His clothes, usually black, were now red from blood.

"Stay back!" He was quick to turn towards Sans, eyes wide. "These are villains!"

"Oh, we have a visitor," A voice hummed.

The other was a man, in his mid twenties, with light blue hair and several hands pressed against his body. Seeing dead hands stylized like that made Sans take a step back, swallowing thickly. Monsters turned to dust, but humans didn't. It was always a little gross to see rotting, dismembered parts. Especially on someone's body.

"The quirkless child seemed to have brought a friend, one that appeared out of nowhere. A teleporter quirk, huh," He mumbled, starting to scratch at his neck. "Warp gate, you useless piece. If he wasn't our ticket around I'd tear him limb for limb."

Two people, and this guy was probably talking about a third. No students around, in the open at least, since Sans could see three people floating in a nearby body of water. Broccoli. Frog girl. Pervert teen. They were staring in horror and shock, and some drool in Mineta's case.

"Shit," Sans cursed under his breath, using his magic to feel for the creatures soul. It had one, a weird looking one, but a soul nevertheless. The moment Sans managed to grasp it, he ripped it to the side, effectively slamming it into blue haired handy boy, as Sans called him, and quickly teleported over to Aizawa's side.

"Holy shit dude, what the hell happened?"

Aizawa was not in good shape. Not only were several of his bones visibly broken, one of his elbows was cracking, almost decaying in a sense.

"They're here to kill All Might, they... that thing is powerful, stay away from it," He said, though his voice wavered, dropping in volume. His eyes blinked rapidly, trying to keep himself awake. "You need to grab the students, get out of... here... please..."

Sans gently let him lean against his body as he passed out, head lolling back. That wasn't good. At all.

"Two quirks, that woman had two quirks," The handy man growled, starting to scratch at his neck. "Bastard... Father, she has two quirks, she's fast, I didn't even see her move..." He dug into his neck further as Sans helped the homeroom teacher onto the floor, setting him down slowly. "We're losing, we have to withdraw, All Might isn't coming."

He seemed to be complaining to himself like a whining child. As he continued to scratch at the side of his neck, he muttered, watching Sans with an intense gaze easily warranted to one of bloodlust.

"So you guys are withdrawing just because I showed up? Man, I feel kinda offended," Sans said, looking across them. One of them had strength, that seemed to be his quirk. The other remained undetermined. Best to keep a safe distance from strengthy for now. "But hey, I won't stop ya."

"Nomu, deal with this person, I want to send All Might a message."

As the big beast rumbled forward towards Sans, he saw, in a flash of speed, the blue haired man suddenly appear in front of the three students. One of his hands outstretched towards Su's face, and he could see a terrified expression cross over the three as it got closer.

Clearly this guy had some quirk, then. And something bad.

Sans let his magic rush over him and quickly appeared right between the two, giving him no time before the hand intended for the teenage girl behind him instead lay across his face.

And... nothing happened?

He didn't feel any pain from the touch, but the guy seemed to grin under his hand. Was his quirk active?

That's when Sans felt it. Not pain, but something fall onto his shoulder. He took a side glace and found a piece of flesh - his human flesh - on his shoulder.

"Sans, that's Tomura Shigaraki, his quirk lets him decay anything it touches!" Hands from behind tried to pull him out of the mans grasp, but he held firm.

"Decay, huh?" Sans asked.

He found himself grinning as he placed his own hand on the guys wrist. He could feel the guys fingers. Not only on his flesh, but on his bones. On his jawline. It felt like like it did before when he was a skeleton. And despite the lack of flesh on his left side, the flesh that was now decaying onto his shoulder, he could move his mouth into a smile. After so long, he felt his bones again.

This wasn't his body. Sans had been taken from his own body, so this flesh wasn't connected to his soul through H.P. As long as his soul remained intact, and he still had this body to host, he'd be fine. Even if all of the flesh was torn away and they left the skeleton, Sans could still use that skeleton.

And you couldn't decay bones.

"I guess your quirk doesn't work then, pal," Sans said, dragging the mans hand away to properly talk. "My quirks a skeleton quirk. So decaying my skin doesn't even hurt me."

Monster bodies were only projections of magic from the soul. As a result, directly attacking those bodies hurt the soul, since they had essentially become a part of the soul. But placing a monster soul into a human body wasn't going to directly connect them. Sure, his magic altered the girls looks a bit, but it was an organic body for a nonorganic monster, his soul would never truly connect to it. It'd be like placing someone into a mechanical suit. Sure, you could control it, and feel the blows, but it wasn't your body. Sans had figured out the fleshy part of him wasn't fully connected when he didn't realize he had gotten a cut in his first month. Only when he bumped so hard it hurt his bones did he discover the truth behind his body.

"Doesn't... hurt you?" The man asked, and asked it so quietly it could be considered a whisper, lowering his head to look at his hand.

And during that moment, ever so brief, did silence cross everyone. It was short lived when the creature, Nebu, still followed the previously given orders and slauntered up to Sans, raising an arm to attack.

"Oh shit, here we go kiddos!"

He quickly snatched everyone within the area into his arms and teleported away. Because of this, he ended up with one of the decaying hands pressed firmly against his arm, causing more flesh to start and break away.

"Why did you grab me?" Shigaraki hissed out, dragging his body back.

"Yeah, why d-did you save him?" Mineta asked, finger shakily pointing to the enemy.

"Because I'm not going to let some guy die just because he's a little pissy," Sans said, dropping the grape looking teenage boy onto the floor with a huff. Sans knew the kid was going through a girl phase, but ever since he tried to sneak into the girls changing room, Sans wasn't very tolerant of him. "I could have left you to die, if we're judging on actions, since you clearly see woman more as eye candy than people during certain times."

He gulped, looking away. Su ribbeted, giggling at him.

Shigaraki laughed, shakily standing up. "You heroes are all the same..." More scratching. "You pretend to save people but then go around inciting violence. I can't wait to destroy you all..." He was growling in annoyance like a toddler would, scratching so much blood starting to gather under his fingertips.

"Uh... I'm not a hero," Sans said, "Just so ya know."

The three students watched as Sans walked forward, each word accompanied by a step. Honestly, Sans didn't know what he was doing. Maybe stalling. He could attack this guy. His quirk had no effect.

"I never did say I was one, buddy. I got a skele-ton of things people don't know about me, but one thing I don't lie about is my stance. I'm not a hero, I don't have that stupid lisencse, but I'm not a villain either. I'm a middle person. I don't like to pick sides, ain't really my thing. Name's Sans, Sans the skeleton. I picked ya up because nobody dies on my watch, not unless I want 'em to. And, quick note," Sans stopped right in front of him, the revealed eye socket sparking blue with his magic, "You should make sure your enemies don't get too close to you."

A grasp of his soul, and Sans was throwing him backwards. A large portal pulled open before he hit the wall, causing him to vanish into wherever the portal led to.

"It's time to go," Portal man said quietly, turning around, and disappeared as well.