He finds the right dressing room

He speed-walked through the backstage's halls, listening for any signs of life in there. It was quiet and every step he took echoed: that Samus must have been an early bird. Strange, she was already in full costume. Surely she didn't have that much work left to do for the contest? Perhaps she wanted to practice some dance routines or something.

He heard some loud music coming from one room. Figuring it must be her, he opened the door as carefully and quietly as he could, forcing his hand to remain steady. He pushed it open as slowly as possible before taking a peek inside.

Sure enough, there she was. She was in the middle of a routine, flipping her prop stun gun between her fingers and striking a few poses with it to the beat of the music. First, she posed with her left leg forward and the pistol in both hands. Then, she did one where she leaned her body to the right, putting extra emphasis on her hips as she feigned pulling the gun out of the holster on her right hip. Then, she gripped the practice pole, raising one leg and spun around a little, ending up in an Allegra-Oversplit kind of pose where her free hand pointed her gun at the audience, the other one holding her leg up while her other leg was curled around the pole slightly. She came down from the pole and struck a more simple pose with her back and ass towards the mirror and her face pointing backwards, looking directly at the starstruck nerd gawking at her performance. Oops.

Yuto gasped, completely freezing up. The jig was up.

"Oh, you're not supposed to be here. What the hell did you do to get in here WITHOUT a VIP pass, huh?" The cosplayer asked with a hint of amusement. Even her voice was perfect for the character, slightly deep and and husky.

"I should probably report you to Jen and the rest of the security staff..." She said as she strutted towards him, hips swaying. Before he knew it, he was grabbed by his collar and pulled upright, allowing the taller woman to see his bulging pants.

"Ah, perfect. Let me make you a deal, then, Mr. Joker. I'll let you get off the hook for this little misunderstanding... If you agree to be my toy for the next hour or so. I think my skills are sharp enough to win you and the other nerds over, but a little confidence boost won't hurt. I need that big brain babymaker inside me, but I need to take charge. Is that clear?"

He nodded weakly, breathing heavily. She shook her head and whispered in his ear.

"I need you to say 'Yes, mistress Aran, I am your toy.' Say it right now, boy."