3rd person POV:

In his search for the dummy civilian, Yn entered one of the "burning" buildings to find a man with a motorcycle helmet aiming a sniper at something.

All he saw in the direction was a tower, so Yn kicked the rifle, throwing its aim off just enough for the assassin to miss his target.

Grabbing his blade, the assassin swung at Yn who hopped back avoiding the attack and leading to the situation he was now in.

Kill-R: You don't know who you're messing with, kid.

Yn: That's what makes this so much more exciting.

Yn: Now show me what you got.

(Vs Kill-R)

First to go on the offensive was Yn, running in, he threw a punch which the assassin swatted away with their sheathed katana.

Using the momentum of his deflected attack, Yn spun into a flying side kick to Kill-R's head, only to find his head whipped in the opposite direction that it should have, and as a result, knock his leg away.

Yn: "Times 2"!

Doubling his stats, Yn rushed in with a flurry of attacks to the stomach which did seemingly nothing to Kill-R.

Kill-R: Are you done...?

Yn: You don't need to ask my permission to attack, ya know?

Kill-R:... True.

(Swoosh)

Quickly pulling out his blade, he swung at Yn who leaned back dodging the first swing.

Sliding his feet back to fix his stance, Yn backed away from Kill-R as he swung his blade around.

Backing up in a spin, Yn throws another kick as Kill-R throws an overhead downward slash.

Yn: "Times 3"!

With his toe, Yn kicked the side of the blade, causing it to narrowly miss him.

Cartwheeling aside, Yn grabs a chair in the "burning" building, brandishing it as a weapon of his own.

Yn: Ah, the poor man's sword. Perfect...

Yn: Let's duel.

Swinging the chair around, he deflected multiple attacks from Kill-R, baiting him to use a much more direct attack.

Which he fell for.

Thrusting his blade, Yn angled the chair so the blade would end up in between the legs of the chair.

Once it was, Yn twisted the chair, pinning the blade at two ends, allowing Yn to force the sword out of Kill-R's grasp.

Ditching the chair, Yn catches the sword.

Kill-R:... Not bad. But sadly, this means your death won't be painless.

Yn: "Times 4".

With speed, Kill-R couldn't quite match Yn swung the katana in a whirlwind of slashes.

Kill-R's quirk protected him from any cuts, however, his clothes were getting shredded, exposing his sensitive skin to the air.

Leaping back, Kill-R picked up his rifle and began firing at Yn.

Yn:(grinning) "Times 5"!

(Bang)

(Clang)

(Bang)

(Clang)

(Bang)

(Clang)

With his speed and reaction time having times 5 multiplier, Yn was able to use the katana to deflect the shots to get close enough to kick the rifle away.

Knowing his quirk would probably protect him, Yn thrusted the blade down on Kill-R, who met the stab with his palm.

Redirecting the kinetic energy, Kill-R boosted himself onto his feet and slightly towards Yn, who he pulled a knife on, returning the favor by trying to stab the kid.

(Clang)

Deflecting with the katana, Yn hopped back as Kill-R pulled out another knife, the second one being curved, almost hook-like.

Yn: This is getting better and better!

Kill-R: Aren't you supposed to be a first-year? Where did you learn to fight like that?

Yn: When you've got a martial arts genius as a parent, you tend to be quite good yourself.

Yn: Now come on. I haven't even reached my limit yet.

The whirlwind of slashes continued, only this time, Kill-R used the kinetic energy from Yn's slashes to keep up with him.

The two quickly became tornadoes of slashes.

Until...

(CRASH)

Something busted through a wall, striking the two. Yn was sent flying through the other wall and outside the building as Kill-R used his quirk to redirect the kinetic energy to his feet.

He went flying through the ceiling.

(Outside the zones)

Darcy's team, minus Yn, arrived where they found some of the other students had made it themselves out of the challenge.

Lisa: What the hell!?

They arrived to find their instructor, Reacher, beaten bloody on the ground.

Darcy: What happened here!?

Fred: Someone beat up the instructor.

Darcy: Who?

Ethan: No clue, we found him like this.

Darcy: Has anyone called an ambulance?

Ethan: I'm pretty sure most of us left our phones behind so they wouldn't break during training.

Darcy: Ethan, go get a phone and call for an ambulance. Then go find Rick.

Keith: I know first aid, I can treat him.

Darcy: Take whoever you need for help.

In the distance:(CRASH)

They turn to the fire zone.

Darcy: Hm? What's going on over-where's Yn?

Lisa:(turns on communicator) Yn, where are you?

Yn:(coms) I'm fighting this assassin dude. Well... Was until I got knocked out of the building by something...

Darcy: An assassin!?

Yn:(coms) Yeah, it's pretty awesome- huh? Sorry, can't talk anymore!

Lisa: Hold on!

Cathy: What was that about?

Darcy: No one goes off on their own. Stick together. Spread the message.

Darcy: Lisa, would you come with me?

Lisa:(sigh)... I don't want to but alright.

Fred: I'm coming as well. An assassin sounds like fun.

Darcy: This isn't a game, Fred.

Fred: Like I care. Now stop wasting time.

He runs off ahead of the girls who quickly rush after.

Darcy:...

Lisa: Why does this shit have to happen to us...?

(Back with Yn)

After ending his talk with his other classmates, Yn found Kill-R leaping to another roof away from his target.

Crawling out of the building after him, was Healy, who was in a skin-tight suit of blood, which crawled all over her body.

(Healy: Bad blood mode)

Moving like a puppet attached to strings, she leaped after Kill-R.

Yn: Don't make a period joke, don't make a period joke, don't make a period joke...

....

....

....

Yn:... Talk about that time of the month. DAMN IT!

He rushes after Healy and Kill-R.

(Crash)

Dodging a smack of a blood mace, Kill-R stared at Healy who was struggling to take back control of her quirk.

Kill-R: So they weren't bullshitting us...

Healy: Please, run! I-I can't control myself!

Kill-R: Sure... But first, I've gotta ask... Where's your daddy?

Healy: H-huh?

Kill-R: You got your quirk from somewhere, so tell me what ya know.

Healy: I-I'm an orphan... I don't know my real parents! Now please just run-

Moving on its own, Healy's body rushed to attack Kill-R, who used his knives to attack the tendrils coming at him.

These tendrils moved at the speed of any normal limb, so the only issue was with how many there were.

Cutting a tendril would cause it to splatter into a liquid form, which Healy reabsorbed by stepping in it.

Kill-R: Your Daddy and I were business partners, so I would really like to know where he is.

Healy: I don't know. I don't know anything about him!

Kill-R: Well ain't that a shame... Still... I know a bunch of people who'd want you...

A bombardment of spikes shot out from the front of Healy.

Kill-R was not affected by the attack until Yn arrived and kicked him in the back.

Kill-R: Ugh!

Grabbing Kill-R, Yn pulled him away from a spike jaw construction Healy's blood made.

Tossing him off the roof, Yn turns to Healy.

Yn: Howdy.

Healy: S-stay back! I can't control myself...!

She leaps off the building with Yn giving chase.

Yn: Hmph. "Times 6"!

The two landed on the street of the city recreation. Kill-R stood up in between the two.

Kill-R: This is what's going to happen... I'm going to kill you.

Yn:(smirks)

Kill-R: And take you.

Healy:...

Blood twists around her arms, forming blades, which her quirk uses to attack, after having tendrils pull her closer.

Yn rushed in with the sword he still had.

Kill-R: I came prepared for someone like you.

Hitting his knives together, Kill-R caused the straight-edged one to vibrate.

On contact with Healy's blood, it caused it to take a more liquid form which constructs could not be made with.

He turned around to see Yn attempting an overhead swing. Kill-R then immediately went to stab Yn who smirked.

Instead of swinging the blade in an arc, Yn held it vertical straight and swung down and deflected Kill-R's knife.

Angling the blade towards Kill-R, Yn thrusted forward as the assassin leaned back.

His own blade chased his chin until he was grabbed by several tendrils and held high in the air.

The blood tendrils begin squeezing Kill-R.

(Cr-crak)

Hearing how his bones were about to break, Yn threw the katana, cutting the tendrils and freeing Kill-R.

Yn: At least try not to kill someone.

Healy: I am!

Yn: Then try harder!

A tendril grabs the katana, spinning it like a buzzsaw.

Yn:...

Quickly shadowboxing, Yn goes into a 7 times multiplier as he prepares to take on Kill-R and Healy's berserk quirk.

TO BE CONTINUED...

(Update)

*Healy

Quirk: *Bad Blood

The user's blood seems to target its threats like a wild animal.

The blood can coagulate into a  semi-solid form with rubber properties. In this form, it can fold in on itself to create much more denser constructs.

The blood can cover the user to protect them, and puppeteer them.

How much defense, range, and density is dependent the blood has is limited by how much blood Healy has.

More defense means less range.

The blood can seemingly sow wounds shut and has a weakness with a certain vibration frequency that destabilizes it.