You we're walking through the halls, minding you're own bussiness, a usual, until you hear some screams, it sounded like a girl.

You came to see what was goin' on, an saw SOME GIRL WITH A KNIFE?? Damn.. well, you better get outta here before you get chased.

You run away, but saw the girl right at the front of you.. (Act cool)

"~~HEHE~~, Oh heya lil' ol' pal! What'dya doin'?"

She's you're resident psychopath! She's A good friend of you.