Linda
"Double battle? Wait wait wait, hold on! I... I don't have a partner," Marnie complained. Not that... Um. Not that it would be an issue or anything! But we have to make it fair, right?"

"Perhaps I could be of help," A familiar voiced asked. Marnie spun around, shocked as a gentle hand rested on her shoulder. It was... That blind man from earlier. Haven, was it? But he didn't battle? Did he?

"You? But... Do you battle?" She asked him. The man gave her a small chuckle, and nodded.
"Of course I do. Now. Selene, Gladion, is it?" He asked. He looked over in their general direction. "How about. Me and Marnie against you two? It would be a lovely thing to hear." As Haven would never see the battle.
Casey
Selene nodded to the man. "Of course! C'mon Gladi!" She was too excited, it's been awhile since she's battled and she grabbed Gladion's wrist and started walking towards the battle field.

Gladion let out a small yelp when Selene grabbed his wrist. At first she would just be dragging him along, but eventually he caught up to her pace and she let go.
Andrew
"Are you sure about this?" Marnie asked. "Not to be rude but... I don't want you to get hurt, if you can't see a move coming, or-"

"Don't worry about me, child," Haven interrupted her. "Where I'm from, becoming an elite four is both difficult, and a huge commitment. I wouldn't have gotten this far if I didn't know what I was doing." He smiled, before gesturing her to the field, and the two followed Selene and Gladion.