Her bully, Trisha, and her cohorts.

…Antoinette, Trisha, and Wanda, who all disliked her for no real reason that Yuki had ever been able to discern, stood in front of her locker.

“Um, hi,” said a fearful Yuki. "That's... that's my locker, so if you could just..."

None of them responded, instead all smiling wolfishly as they walked towards the cornered girl.

Whatever the trio had planned, Yuki knew it couldn't be good.