Phillip
His expression relaxed upon hearing that. "Famous because you're not 'normal?' I'm not sure that's the case." Getting into thought, he closed his eyes for the moment. "It's probably something else. Maybe simply because of your extraordinary skills as a trainer. Not being able to talk could probably be part of it but it's more common than you think!" And here he was rambling off. Leon was unaware if Rhea was just saying the fact as a sort of distraught but he wanted to reassure her somehow. 

"I've met a lot of amazing trainers here. Red, Anvi, and more! They're all unable to talk, or just quiet, but they manage to somehow communicate with their Pokémon. That just proves their bonds with them!" He opened his eyes and then place a hand on Rhea's shoulder to pat. "What do you do? Do you make some noise? There has been some trainers who make clicks or whistles and that initiates the moves!"

After withdrawing his hand, Leon did the Pumpkaboo pose again and repeated Rhea's lines. Well. Kind of. "'Here comes the *Famous* Rhea! Hope you're ready for an unpredictable battle!' Well, how was it?" He couldn't help but widely grin afterwards, as if he accomplished a very impossible task.
Beth
'That's where I come in. It's my job to telepathically communicate from Rhea to the Pokémon.' The Musharna explained... Telepathically to Leon. 'Though she tends to also do some hand motions. They add tone and importance.'
Walter
She nodded to her Pokemon and patted her back a bit, looking back to Rhea. With how Leon spoke, she never really thought of her lack of speaking as something cool and/or normal. People found it unusual, so she went with it.

She glanced at her board and listened to Leon, smiling slightly and nodding to him. It sounded perfect, and Rhea was quite amused by how Leon gave 100% and did the pose as well.

As a sort of sign of approval, she brought her phone out and put it to the video portion, handing the phone over. Rhea wanted him to record it, since she liked it.