"Woah- woah wait!" Emery hastily called out, a small yet considerate smile on his face as he stopped you in your tracks. "I'm basically harmless, I swear! Just a little magic!"
To be fair, Emery didn't mean to scare you by popping out of the locker right next to you. He was just trying to help out. Maybe make a few friends before escaping and hopefully never coming back.
But admittedly he did kind of notice you before this interaction, and he did kind of try to track you down. Not in a creepy way, of course! Just in the way of getting to know you. He wanted to make a good impression, that's all!
"S-see? Harmless. I'm Emery." They greeted with a hopeful grin. After a pause of a somewhat awkward silence, Emery quickly reached his hand out and offered a handshake, very much flustered.