How to I get rid of this weeaboo?

So I sit next to this girl in my history class -who is obsessed with anime and japan. And I mean OBSESSED, in the same way an 8 year old boy has spasms over Minecraft. Basically she's so obsessed that it's cringy.

When she talks she tries to sound cute by adding 'desu' at the end of each sentence. Whenever she eats something she always says 'sugio'.

She's overweight and by the smell of her, and the way her hair is always greasy, it doesn't really seem like she washes much.

As I may have said before I sit next to her in history. Whenever we finish a topic we get to watch a movie that's based around the time period or was made during the time period.

We had a choice of watching Pinocchio or Bambi because they both came out during WW2 apparently. We ended up watching Pinocchio, and the weeaboo who sits next to me said; "oh my god! Isn't Pinocchio such a kawaii shota!"

I asked her what a shota was and she told me, 'oh shota is the Japanese term for a boy that is young, girly and fuckable!' - not even kidding she said that today. Right at me! She said Pinocchio - a boy under the age of 9, was fuckable!

But it doesn't stop there, oh god it doesn't stop! It gets worse. She kept on making these ridiculous soft moaning sounds, trying to mimick the ones you hear in a hentai, and she asked my teacher if she could 'use the bathroom'.

And that was just today, she follows me and my friends round and none of us have had the guts to tell her to leave us alone! Please give some advice

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