Given the door, Griffie may have expected something weirder than an ensouled bar, but an ensouled bar is what is there.

Apparently Bar isn't the talking kind of intelligent item even if she's the listening kind. Napkins are cool too, though.

Allegedly this place is a demiplane, with time not just slow but stopped outside. With categorically adequate security for inside the main bar area, which Bar heavily emphasizes. Griffie's empathic link with eir party members is no longer working, which is solid evidence for the 'other plane' claim. And Bar doesn't have seal-scrambled publications, which are too messed up on a fundamental informational level, but 'any published work' extends to the antebellum Aiquzall published works which made it out of the seal. Even if they were only out for a brief period before being attacked by Bibliodaemons. Which is extremely compelling proof that this place is advantageous enough to merit not reopening the door too soon.

If Griffie's going to stay here, ey'd like to see the local free healing, injuries put em in less of a mood for studying even if they're pretty minor.

In the healer's office is what appears, to the naked eye, to be an albino human woman. 

Except that human women of any stripe tend not to have souls like this, blazing with concepts of fire and light and motion and other things in infinite layers of recursive meaning. 

Humans are a popular species even across alternatives, it's not particularly surprising that in a human-shaped space a Power would take a human form.

Categorically-adequate in-bar security, and she isn't presenting herself as threatening. "Greetings to you. Are you the one hired to provide healing to patrons?"

"Yes, that's right! What do you need healed?"

A Power staffing a healer's office in an illegal demiplane. "I don't know what your capacity is like? If all you can manage is some recent scratches that's fine."

"I've never once met a physical ailment I couldn't cure. I've fixed brain damage five thousand years old."

"Good work there! I've got a curse on my soul, pretty sure, if you could give it a try that'd be lovely? But ideally carefully, it may not like being poked. Not sure."

"Ah. Curses I've had less universal success with, but you're unlikely to be in as bad a way as Mr. Candles. Can you describe the nature of the problem?"

“My best model thus far is that there is … something like a parasite or a flame … woven into my soul and eating away at it, present at the times my soul’s individual components were created.”

"Well, that's unfortunate." 

She speaks a word that Milliways fails to translate, in a voice like tumbling crystals in a waterfall. Then she peers at their soul, made visible by her magic. 

The soul is divided into many components, all of which are very slowly ~burning and appear to have been patched with some other soul material, which is also slowly ~burning. Furthermore, the soul’s connection to probably-the-brainstem-by-location looks like it’s had a lot of strain on it in some recent-ish incident, which doesn’t help. The whole assembly will probably fall apart in 5-13 years or so at this rate.

She rummages in her bag to pull out a spectacle contraption with a variety of lenses raised and lowered over the eyes with little levers. She puts it on and peers some more. 

"This would be easier if I had a trustworthy devil helping," she mutters. 

The patient looks confused. "Why a devil in particular?"

"They're good at looking at souls." What happens if she glows just a little bit at this guy, does it do anything interesting. 

Nothing happens on a soul level. Eir physical injuries are mostly gone.

"Hmmm."  She pulls a lens in a very odd shade of green out of her bag. "You're a plant, right?"

"I am a combination of a portion of the soul of an elf and various nature spirits, with a body formed from a plant. …the elf took pieces off her soul on purpose, and nature spirits often meld with things. I can go into detail on bodily construction if that'd help."

"--So introducing factors specifically beneficial to plants is not likely to help the part where the healing energy is being directed towards your body away from your soul."

"That sounds unlikely, yes. Would it be possible to introduce factors specifically relevant to senescence?"

"--What does senescence have to do with souls?"

The patient makes a series of odd faces and considers starting multiple sentences before saying "…I'm glad there are people who are in a position to ask that question. In the context of souls, it's the decay phenomenon I have. Is there something helpful I can elaborate on here?"

"Where I'm from senescence is a purely physical phenomenon and people who don't have that physical phenomenon don't senesce. Is that not so in your universe."

"So, physical senescence is a pattern where the body wears down faster than it can repair itself and deteriorates and ultimately fails, right? That's … also what's going on with souls, where I'm from. Except I'm pretty sure it's not a natural phenomenon."

"The souls I'm familiar with don't wear down."