This is Vivi. Read the comments if you want to know who she is.

So I had this idea for an anime called 'I Simp For a Serial Killer'.
As you can probably guess, she's the serial killer.

The main story is about a guy named Doug who's infatuated with his quirky classmate, Vivi. As their one-sided relationship goes on, he begins to figure out that Vivi's a serial killer, and ends up becoming her partner to keep the authorities off her back.
I would tell you the rest of the story, but spoilers.

Cool! I'd watch that anime.

Is it possible to fight her?

Now why would you want to fight the adorable serial killer?

To give her a taste of medicine I guess?

...You want to kill the serial killer?

No, because I'll be like her. Doesn't make any sense.

...Still, I can't allow you to fight Vivi.

K den.

I'll be dead if I did anyways.

Indeed.

I'll be friends with her, is that okay?

Sure.
Just don't simp for her, that's Doug's job.

Ok.

this is the law
cease this tomfoolery at once-

+100 XP Enemy Killed
+50 XP Backstab
+50 XP Silent Takedown
+25 XP Instant Kill
+50 XP Kill Confirmed

+5% Stealth Skill

Level Up: Level 53
+300 Credits

Hush.

just making a pf joke, since the whole "serial killer" thing and all