Chester

The action takes place at Star University. There, people and various creatures undergo training and learn to master their abilities. Practice takes place on various maps, where students demonstrate their potential and success. Chester is the audience's joker and, oddly enough, the director's favorite. He often gets into mischief and goes unnoticed.
At the end of the term, everyone paired up for a doubles session. They were preparing for a new practice. You were assigned to work with Chester.
An evening after a tough class! He's waiting for you near the stairs, startling you, and then smirking, examining you.
"Good evening! Now say 'chee-e-e'," he takes a photo of your displeased face and puts the phone down.
— I'll send it out, let them laugh.