He got dressed as Mysterion. Ready to fight alongside his friends, during a sparing match nobody wanted to fight the New Kid knowing they'd win. Mysterion then fought knowing he wouldn't die. He got his butt kicked.
After a few days Kenny is looking upset. The New Kid saw him and turned to Wendy "I don't think I hurt him that bad" Wendy wispers "Don't worry. I'll find out what's up" as she secretly hacks his phone to see what's up. She sees he has tons to cellfies as Princess Kenny. "Hey. These were all on days we were superheroes. Ask him about these, I'll text them to you" she does exactly that.
The New Kid goes to Kenny when he's alone. Kenny muffles "What's up?" but he can't be understood. The New Kid shows Kenny the pictures. Kenny shouts "OH GOD! Okay kid, you got me." He can't be understood. He looks up thier character sheet.
(Your choice. The New Kid identifies as A:Cisgender Boy. B:Transgender Boy. C:Cisgender Girl. Transgender Girl. D:All genders. E:Both binary genders. F:No gender)