DON'T YOU DARE SIDECAST THE LOSERS CLUB, ANY MEMBER, AT ALL! Mike is already side casted enough! I understand that your OC needs to fit I somewhere but i'm PRETTY sure you can do that WITHOUT side casting a cast member. 

ALSO! Please, just please don't steal other characters lines, I honestly hate it! It gets me TRIGGERED, you can create some lines for your OC without stealing a character's lines, ESPECIALLY RICHIE'S IF YOU STEAL ONE OF RICHIE'S FUNNY LINES I WILL PERSONALLY THROW HANDS!

etc; 

THE WRONG WAY: 

  Bev - I need to show you something

Your OC - More than you showed us yesterday at the quarry?

[ this is what will get me to throw hands, seriously ]

THE RIGHT WAY: 

  Bev - I need to show you something

 Richie - More than you showed us yesterday at the quarry?

Your OC - Shut the fuck up, Richie!

[ this is what will spare your life ]

i hope this helped :)

( lesa! )