Brian
"Allister..." Zephraxe repeater, committing the name to memory. "I'll remember that. Oh, and I figured you were from Galar, based on the accent." 

He considered how to answer Allister's questions and concerns. He stood back up, removing himself from the wall, and looked around. "Well... There's a lot to research in my field of work." He stepped over to a nearby window and peered outside. He held his hands behind his back in a professional manner and glanced back at the boy. "If you would like, I could try to explain why I'm here specifically. My research touches almost anything related to psionic theory, so anything that might be considered supernatural. Psychic energy, ghosts, aura... Those kinds of things." He turned his head back to the window. He felt more calm now. Being able to talk about things he liked always helped him focus. He could sense Allister's mind clearly now and feel the energy that flowed through the place.
Christopher
Allister nodded, figuring, yeah, valid. Although most people just judged the stupid outfit. Recognizing his accent was better in the boys opinion.

"Explain?" The boy gave a shrug, but was curious and he let him continue... "Hmm..." He quietly commented, after Zephrax finished explaining. "I... D-don' know much 'bout psychics. B-but ghosts, aura... Um... I kn-know a lot about those," Said. Along with being able to talk to the dead, the boy always had some kind of deep spiritualuty. Maybe that's what brought him closer to things that weren't... Really there.

"Y'know..." He started... Oh Arceus, he was gonna regret offering. "Um... Back home, 'm kinda-kinda known for... Um... Knowing about this stuff. Umm, you see. I talk to ghosts... It's w-weird I know. But..." He looked away, tapping his fingers on his violin for a moment... "I could... Try to help?"
Brian
Zephraxe turned to face Allister and watched him closely. "You can talk to ghosts? I wouldn't call that weird. Definitely interesting, though." He crossed his arms in front of him and put a hand to his chin. "Psionic potential manifests in different people in various ways... Your abilities are certainly rare, but not unheard of." 

This boy certainly had a special talent that, if Zephraxe was going to be honest, could help him immensely. The researcher was well aware that whatever haunted this place was powerful and likely very dangerous. It was not one of the spirits that joined Allister for his music. The anger it felt... If any other person or Pokémon came, they may never leave. 

Zephraxe glanced up at the ceiling. He felt the energy emanating from above... 
"Yes, actually. I could use your help." He looked back down at Allister. "But... What I want to do is potentially very dangerous. I don't want to put you in harms way, but your power could allow us to settle whatever is going on here without anyone getting hurt." He took a deep breath and exhaled. "I take it your understand?" He asked. Zephraxe knew he was being a bit cryptic, but if Allister agreed and was capable of helping, then he would explain everything.
Christopher
"Really?" Allister slowly crossed his arms, regarding the strange man who just started talking about powers or something. "'M not psychotic," He said, completely using the wrong word. "I just l-listen... Um... More than others do." He simply said. Though a brief moment of the accident that caused his gift did flicker in his mind, but he decided not to bring it up. Besides, he still wasn't sure if that was the only cause of it.

*"Yes, actually. I could use your help."*
"Oh-oh really?" The boy asked. Dangerous huh? He never really saw ghosts as dangerous, though his deep bond with them probably helped... That being said... Allister thought about the offer, remember the negative presence he felt. When he stepped in, it was almost chaotic. Like the happier spirits he'd danced with prior were mixing with some kind of hateful force. And Zephraxe had felt like the place "Didn't agree with him," As he'd said.

Allister whistled, and out of his shadow popped Arcana, who was looking at his trainer with a sort of agitation... Like he was on edge...
"Hmm... You o-okay buddy?" He didn't get a response, just some growling. Well... That didn't sit right with the young gym leader. As he handed his violin off to the Gengar who stashed it away somewhere, he gave his partner a pat on the head, only to be met with more growls.
"P-pardon..." Allister said, shaking his head. "Something's not right here, he's usually never like this... Wanna g-go back into my shadow?"
More growls, again. Sighing, he pulled out a pokeball, and Arcana returned, seemingly not wanting to stick around out in the open.

"I'll help." Allister said. Didn't take long to decide. "For... Um... All the h-happy ghosts living here." He smiled, unbeknownst to Zephraxe. But he *Still* Wanted an explanation.