When the process began, the old faunus closed his eyes and focused on his senses. He knew Jocelyn had enough control not to cause him harm, but at the same time what they were attempting was, in a word, experimental. Both teacher and student knew that she could conduct her Aura unto another, but passing it "through the lens" of Dust and its energies... well, surprises were almost a guarantee.
For the first few moments Budonoki didn't notice anything in particular. The air around them both was calm, the crystal seemed steady and even... it seemed like nothing of note was happening. Perhaps another approach was needed? He'd been so certain that this would work --
A faint gust of wind stirred around them suddenly and, in that moment, the surgeon-sage felt it: crisp and cool like a winter morning, yet not harsh in the least. His eyes opened and he glanced down to where the crystal was pressed to his palm, seeing at once a faint mist that seemed to spill in ribbon-thin wisps from his entire arm. And not just his arm, either -- a glance up and down confirmed that the effect had spread from head to toe. Whatever Jocelyn had evoked through the crystal, it had suffused his Aura.
"...Fascinating." He lifted his free hand and moved it about slightly, trying to gauge the effect. It wasn't immediately clear what was at play. The sensation was becoming clearer -- cold, but insulated, reminding him of a snow shelter he and other monks had once hunkered down in during a bad blizzard. The warmth of the sunlight felt... numb, somehow, as though barely reaching him. "The chill is palatable, like an aspect of cold itself has merged with my Aura. I wonder if..."
He rose, mindful of every move and sensation as a possible clue. "It could be... yes, I would venture that you've succeeded, miss Antiqua! This, I believe, is some manner of thermal shell radiating from my Aura -- a boon, perhaps, against intense heat and fire? Worthy of further testing, to be sure; perhaps at the campfire later. But there seems, in any case, no doubt: you did successfully harmonize the power of the Dust crystal and your Semblance, and on your first attempt at that! Excellent progress, my young Huntress! I knew you had it in you."