Finn Hudson
You are Brittany's little sister (about the same age as Becky Jackson)

Kurt Hummel
You are Artie's older sister (you were out of town when the accident happened)

Blaine Anderson
You're the twin sister of Sam Evans

Quinn Fabray
You happen to be the less annoying and more fun twin sister of Rachel Berry

Rachel Berry
You are Kurt Hummel's baby sister

Arthur 'Artie' Abrams
You're the adopted daughter of Will Schuester

Noah 'Puck' Puckerman
You are Santana's baby sister; you're the same age as Becky

Brittany Pierce
You are the ever fun loving sister of Noah Puckerman

Santana Lopez
You are Quinn's baby sister; you're the same age as Tina and Artie

William Schuester
You are Finn Hudson's older sister (an adult with a job at William McKinley High)