"Yeah, I can fix that." And it's really only a little too eagerly that he walks closer to Celestia, tries to shake off the black gunk congealing on his hands, and fires up his healing magic--

it comes so easily now, like flipping a switch and asking please.

Celestia will feel whatever pain fading away, a color of pink so light as to be white suffusing the space around her. It's not bright enough to outshine Celestia's light, but it does carry a warmth that hers is lacking.