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."

"Given the context, I figured. I want mine to be like that, if it's manageable."

"That should definitely be doable! The only question is how complicated that's going to be to achieve." 

"Well, my original plan was 'kill a god and then see how things are going', so if we can do better than that I'll be pretty pleased."

"In my experience dead gods aren't less trouble." She flicks through some more lenses, occasionally humming thoughtfully. After a few minutes, she crosses over to a cabinet, opens it, and pulls out a glowing white jar. 

"To clarify, my original plan was to defeat the god of death, which as you may note is rather open-ended. He does have servants that just hijack the power of whoever kills them, and if I could, say, literally stab his form with a very powerful sword I would conclude it was a trap and not do it. I just don't really see how a victory here involves him continuing to exist with the sorts of things one typically requires for continuity of identity, so, 'kill a god'. …plausibly also true for Aszy and the Abyss, but there at least exist sincere devil and demon defectors, which is promising."

"I think you and I probably mean different things by devil and demon. Now, I'm assuming from your current patch job that you're alright assuming some risk of long-term structural alteration?"

"We can discuss devils and demons if you like at some point. And regarding structural alteration … I want to live. A lot. I would be curious about what the risks look like in more detail, though."

"You might become...a little bit more like me. If you can't see souls I have some lenses for you to look through to have the faintest idea of what that might entail--basically, this stuff," she gestures carefully with the jar, "is soul-superstrate extracted from me and stored in a substrate of honey. Eating it will apply that superstrate to your soul instead. And anything that used to be a part of me is infused with my light."

"More like you in the sense of having a soul blazing with concepts? I can see the concepts are a thing. But I don't have a good model of what it's like to experience or what the side effect profile is like."

"You...probably wouldn't get all the way to that. If that's what you're seeing, I have a different lens--" she rummages for a bit and then offers them a dark amber lens to look through. 

Griffie will take eir current glasses off and have a look through the lens. (Magically useful lenses reminds em of eir wizard friend with the swappable-lens goggles, whom ey won't get to see in a while, which is too bad.)

Her soul has other characteristics, once the conceptually-heavy light is mostly filtered out. She's part thing-that-makes-Light and part thing-that-goes-very-fast and part human, and these things are all very different from each other but they blend together smoothly and organically, in the structure of her soul.

Griffie will take a look and hand the lens back.

"Thanks for lending me the lens! I don't see anything obviously wrong with being part light source and part fast thing, if I'm parsing those right, and I assume me ending up more whatever sort of typical-mortal is in there is implausible, but again, I don't have a good model of what it's like to experience or what the side effect profile is like."