My suggestion to YuriWriter 

Nozomi: Ready guys? *secretly filming*
7 other + Arisa: (thumbs up) 
Arisa dresses up as Leatherface and holds a FAKE chainsaw 

Honk sets the squad up

Eli: (She seems angry and carefully at the same time)
Umi: She seems pissed...
Nozomoo: Well, that would make it 10 times better!
Pana: It's just always Eli-chan after everyone we've pranked today....
Nico: It's fun tho since we always got to see her scared like shit and just run away.
Maki: Well maybe not this time tho since she looks pissed af.
Nozomi: Well, have to wait then! Even her (points to Arisa) enjoys this.

Well, not anymore...

Eli: Every fucking time! Don't they know how to learn? (Yep, still angry since that prank)
And now I'm late as well...

Arisa goes out with the costume and using the fake chainsaw with a sound generator app on her phone to make chainsaw noises

Kotori: Ummm... guys?
Nozomi: That's weird. She doesn't look scary at all.
Umi: Odds on anyone?
Others: For what?
Umi: For-

Eli suddenly PULLS OUT A COLT PYTHON and AIMS IT AT ARISA

Maki: (whispers) WHAT THE-   
Arisa: (totally in shocked) Wait-
Eli: (goes full Russian mode) STAND STILL YOU MOTHER FUCKING PIECE OF SHIT!!!

Arisa is so shocked that she can't even move. She is shaking.

Eli: (kicks Arisa's leg) GET DOWN!!
I SAID GET DOWN!!!!

Arisa: (has to do what was ordered while shaking and crying) (Eli bashes her with a very annoying Russian accent)
Nico: FUCK!! GET OUT THERE, NOW!!! 

μ's rushed out real quick... 

Right then, Eli pulls the trigger. A big sound can be heard from miles away.

Everyone: (kneels down and cover their ears)

Arisa: .......... (Why aren't I...)
Eli shows everyone her phone which has a gun-sound app  

Nozomi: YOU-
Eli: SHUT THE FUCK UP!! I CAN'T TAKE IT ANYMORE!!
Rin: (lies down) Omg... I'm gonna die...
Honk: Wait... Did you talk about-
Eli: YES!! All the pranks you did on me! I just want to give you a lesson about what will happen if you prank the wrong people!

Kotori: We just thought it would be fun seeing you being scared and run away...
Eli: Not to mention if we are in the USA, this girl (points to Arisa) would die immediately!!
And you too, little girl! (Scolding in Russian)
Maki: Alright Eli, don't go too harsh on her... 
Nico: I think what we've learned today is "Never prank an angry Russian".
Nozomoo: Elichi... I'm sorry. I never thought you were that offended.
Eli: (sigh) Just... don't do this anymore.
Umi: She literally captured the whole thing and just sit there lifeless at the screen for like, what? 5 minutes!
Eli: (pouts) Then who started it first? Tell me!
Hanayo: Okay... let's just stop this and never talk about this again.
Kotori: Ok... Call it a day then.

Arisa: Onee-chan...
Eli: (hugs) I know, alright?
Arisa: I never thought...
Eli: Just stop talking and go home together.

Arisa: (sigh) I want a brainwash...
Eli: Look, I'll make up for this, okay?? Anything you want!
Arisa: You promised, onee-chan! (smiles)
Eli: Yep!

.....

To @YuriWriter , who has come this far:

This chapter is all I want to say about your book. It's fun, but can also be very triggered to some people. Sometimes me tho, but I'll be polite.

I will have to unfollow your book "Scare Eli" from now on. I'm so sorry, but I'm just gonna say the reason behind this is because I don't take pranks very well, and that's it.

I will keep supporting you on other books, it just not this one. Stay strong and keep up the great work, you deserve it.