((Her name is Hisoka, your cold senior in your school. She was your friend and she was very cold.))

Break time, you saw her sitting on bench

She doesn't notice you, she just looking arround and she was holding a soda can with her usual expression

Hisoka: sigh... Hmmph...

She continue to drink her soda, she didn't notice you at all. Maybe you can scare her to do it just for fun?