(a/n): I didn't see aot in loooong time so some parts of this will be kinda weird

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Slenderman's (your) p.o.v.

I am currently walking around my forest looking for any humans or Titans, I like Titans they are more of a challenge than humans

Suddenly I heard a horse nearby

(Y/n): hmm?

I calmly walked to the sound of horses and people talking

When I saw them I wasn't impressed by the swords or the gear that helps them move around

(Y/n)'s mind: is it hard to not walk into MY forest?!

You looked at them more seeing there are 2 guys and one girl

One guy has black hair and grey eyes while the other one has brown hair and green eyes

And the girl has black hair silver eyes and red scarf around her neck

(Y/n)'s mind: let's get this over with

You said in your mind getting ready to attack them but you heard loud stomping

You sighed and looked at the giant Titan that's heading your way

You see the scouts preparing their weapons waiting for the Titan to come

You teleport on tree branch watching the fight

[After the battle]

The Titan gave last scream before falling to the ground with sliced neck

(Y/n): well they are not that bad in fight

You said interested

You see them looking around more than getting back on their horses and riding back

You decide to follow them wanting to fresh flesh

[Timeskip]

You looked at the giant wall in amazement seeing how big it is

(Y/n): i-it can't be all around the city

You said teleporting around the wall fastly

(Y/n): that must take ages to build...

*You teleported inside*

You see that no one noticed you yet so you hide behind some buildings

Suddenly you heard someone shout behind you

???: Hey! Who are you?!

You turned around seeing three guys with masks and daggers in hand

Bandit1: b-boss w-what is t-that's?

B.boss: i Don't know let's kill it!!

Before they made their first step they passed out

You sighed walked to them and started devouring their bodies

Annie's p.o.v.

I'm walking around the town in my uniform since I don't really like other clothes, as I am walking I heard something like flesh being torn off

I looked around and quietly walked to the sound, and what i saw interested me

I see 3 skeletons with bits of flesh and skin on them and a really tall guy with tendrils standing right above the skeletons eating the flash off of the skeletons

It looked at me and I started to hear statics, I was loosing consciousness, then everything went black

(Y/n)'s p.o.v.

I looked down at the female that went unconscious after I used my powers, I wanted to eat her flesh but, something tell me not to

I picked her up with my tendrils and started walking around the city making sure no one sees me

[Timeskip]

After Annie wake up she was startled at first but after she got to Know you more she introduced you to her friends like Berthold,Reiner And other Titan shifters, yes you knew they were Titan shifters and when you told them they were surprised and you asked 'whats the plan?' after that you finally got to Know their plan aaaand they even added you to the plan! Your part is to help kill people and destroy the city and after That escape and you will protect them, so im here and I'm listening to Berthold telling  us the plan last time

Berthold: do you all understand the plan?

Everyone nods

Berthold: (y/n) do you understand the plan?

(Y/n): yes!

You shouted laying on your long bed

Berthold: alright let's rest next week we will start

Everyone gets up and starts walking to theirs rooms

You stand up and teleported on the roof

(Y/n): *sigh*

???: What's wrong?

You looked behind you seeing Annie with her usual expression

(Y/n): it's about the plan... I'm worried... About you..

Annie walked to your side

Annie: why?

(Y/n): what if something goes wrong and they get you... They might even kill you but I'll never let anyone hurt my love

After you said that you blushed and quickly covered the place where your mouth should be

(Y/n): I-I-I MEAN M-MY F-FRIEND

Annie: (y/n)

(Y/n): B-BECAUSE I-I-M YOUR F-FRIEND AND-AND

Annie: (Y/N)!

you quickly shut up and looked at Annie

Annie: you... Have feeling... for me?

You sighed and looked into her eyes

(Y/n): Y-yes Annie, I (y/n) Slenderman (l/n) love you, because your amazing I love the way you punch me even if it hurts like hell I loved it because it was the first time you touched or hit me...

Annie tried to kiss you first but you were too tall for her

You chuckled and bent down created and opened your mouth to kiss her passionately

(Y/n): I love you Annie

Annie looked at you face with mouth

Annie: I love you too (y/n)

You both hugged

[Timeskip]

(Y/n): these fucking Titans are so weird, some have huge fucking eyes like an anime character another have face like he was hit by Chuck Norris , AREN'T THERE ANY FUCKING TITANS THAT ARE NORMAL?!

Berthold: (y/n) what is wrong with you? Calm down

You looked at Berthold in anger

(Y/n): NOTHING!!

you calmed down and looked at the armored Titan that's carrying you and Berthold to the wall while female Titan is leading Titans to the wall

(Y/n): well looks like it's your time, be safe k?

Berthold: *sigh* alright man

Berthold said as the armored Titan placed him down and runned to safe distance

You waved at female Titan

She looked at you smiled and waved back

(Y/n): I love that girl...

*BOOOOM*

You see a huge cloud of smoke as the the form of collosal Titan starts forming

(Y/n): Berthold you told me about  your Titan form but... YOU DIDN'T SAID IT'S 60 METERS TALL!!!

you see collosal Titans leg kick into the gate making hole big enough for the Titans to go in

(Y/n): alright now we go in. right Reiner?

Armored titan looks at you and nodded

(Y/n): alright!

You said teleporting from his hand on top of the wall in front of the collosal Titan

(Y/n): well let's start

You said teleporting in front of the people as they were running away

(Y/n): this is going to be fun

You said killing the people with tendrils

You continued to kill people and destroy buildings with the help of the other Titans

Suddenly you hear something flying above you

You looked above you seeing some guys in uniforms with their gears and swords

You recognize some of them like Mikasa, Armin and Levi but you didn't know about the others

Armin: what is that?! It doesn't look like Titan it's too small

(Y/n): small?

You said startling them

Mikasa: it can speak?

(Y/n): SMALL?! AM I TOO SMALL FOR YOU?! NOT FOR LONG!!!

you yelled tearing open you mouth and biting into your arm making a huge explosion

There was a lot of smoke around you

(Y/n)'s mind: I hope I didn't bite into my arm for nothing

After the smoke cleared there stood 30 meters tall Titan covered in black

You looked at the guys seeing them flying to your neck nape

You used your tendrils to protect your neck nape , they avoided some of them but you caught them all

Before you kill them a 15 meter Titan attacked you

You fall on the ground and the Titan starts beating you

(Y/n): Grrrr

You used your tendrils to hold his hand and legs and started to stretch him making him scream in pain

You looked back at the guys seeing them going after other Titans protecting innocent people

You then feel the Titan bite your tendril making you drop him and scream in pain

You see him charge at you

(Y/n): I had enough...

You said using all your might beating and tearing him apart after that you throw him into building

(Y/n): now I need to find Annie

You looked around seeing other Titans eating people and Than you see her

You teleported to her kneeled down and hugged her

(Y/n): I'm happy your alright

You said while she returned the hug

Suddenly you heard a loud roar

You looked and see the Titan you tough you killed , he was in berserk mode it wasn't hard to see that

He jumped on you knocked you down and teared all your tendrils while you screeched in pain and anger

After he was done he start chasing Annie attacking her

(Y/n): *groan* a-annie

You said in pain seeing Annie fighting with the Titan

You blacked out

[Timeskip]

(Y/n): uhhhhh

You opened your eyes and stand up noiticing you're still in your Titan form

Suddenly you heard screaming

You looked towards the scream seeing the Titan on top of female Titans body that doesn't have arms legs and head

You see that the Titan could bite Annie

Your eyes widened in horror and you quickly sprinted towards them

Before you got there a huge blue light could be seen you covered your eyes

After the light died you see Annie trapped in Crystal

(Y/n): NOOOOO!!!!

You teleported your tall form to her crystal

You fall on you knees as you grabbed the crystal with your hand

(Y/n): a-annie...

You said hugging the crystal

The soldiers looked in shock from seeing a scary looking Titan and it was speaking

Soldier 1: what should we do?

Mikasa: we're going to kill it

Mikasa said flying to you

(Y/n): one day you... You'll all pay for this...

You said creating a huge cloud of steam around your body

You teleported into your forest

After that you put the crystal on the ground transforming back to your form

You walked to Annie's crystal

(Y/n): Annie....

You opened your mouth and kissed her crystal

(Y/n): please... Come back to me

You said sadly falling on your knees and crying

The end?

(A/n): I'm sorry if this was bad but! This was my first time writing a aot x reader and I dare to say this that this is good anyway until next oneshot bye!!

In next oneshot:

(Y/n): ello ledy! Do You know de wei?

(Imagine him being red)

The girl screamed and runned away

(Y/n): why are you running? Why are you running?

You just stood there in silence as everyone else runned away from the small creature that is you

(Y/n): she's got da ibola