More Than Just a Wallflower

After a highly successful solo at the CHS musical showcase, you experience a burst of popularity. Maybe you can use this opportunity to find yourself a new girlfriend? Maybe "the one"?

However, you forget all about that when you accidentally bump into a random, green-haired girl. She gives you no compliments. Her cold, distant demeanor catches you completely off guard. She claims you've met before, but you don't recognize her. But chillingly, she also says she's used to being forgotten.

Who was she? What's caused her to be so walled off? More importantly... why couldn't you stop thinking about her?