Admitting a small badger.

The receptionist for the Imperishable Brotherhood can't be living, because of the vampire members, and it can't be undead because of the lich members. So it's a construct.

"Pardon me, but are you a member?"

"Not yet! But I have this Invitation to join!"

The golem takes a look at the the proffered letter. It's a letter inviting the Lich Eriape to visit at her convenience. 

"Are you Eriape?"

"uh"

"Yes, Well there's this Thing..."

"I have called for the club secretary." 

Miss A. N. Thackeray arrives with her usual bustling efficiency. She wears a white dress and white wrappings around her limbs

"Gentlemen." She looks down. "Badgers. What's the trouble, Three?"

"They have an invitation."

"An invitation now? Let me take a look." She pulls the paper to her. "Eriape?"

"Regrettably Not! I am Harià."

"No, I can see that. I've heard the recent news."

"Eriape had something of a Predjudice against Osirion, and so she wouldn't Move Here unless Forced To."

"The treatment of women?"

"The Badger is not Native to this Land."

Arodia nods.

"Entirely understandable. I was sorry to hear she was captured."

"We were Overmatched."

"Yes, I find the trick, rather, is to stay hidden. My father and I stayed hidden for a thousand years, and only came up to the surface because of the upcoming Age of Glory."

"Yes, I heard about that. My condolences."

Arodia straightens her white dress. "Yes, it was something of a disappointment. Still, make the best of things, shall we? I'll introduce you to our members in residence!"

Once upon a time a most terrible necromancer wanted minions, and thought the graveyard of a monastery on a moonless night was the place and time to get them. Create Undead - Skeletal Champion doesn't offer a will save, but the created undead isn't immediately under your control, you still need to gain dominance over it the next round, and not only does that offer a will save but it also has a very limited range and Sadegh is already running in the opposite direction and unlike him you don't have Darkvision. For all their supposed cunning, wizards are often idiots. He thought to chain the body up first the next night but the monks had been warned by then and thought to keep better guard.

In theory his condition could be fixed by a resurrection, but Sadegh is neither a powerful cleric nor a wealthy man nor inclined to rely on the aid of others.
It could also be fixed by killing him but the abbot wasn't certain he wouldn't thereby be damned to Hell.
And upon a rereading of Unbinding the Fetters with a newfound perspective, none of it actually forbids being a skeleton.

Some people find the experience of unlife extremely unpleasant. This is caused by wanting to instead be alive. Stop doing that and it's fine actually.
Some people find the horror of it eating at their sense of self and driving them mad with rage. This is caused by insufficient meditation.
Sadegh can more or less deal with it, and there are still places to go and challenges to overcome and he still has a body to perfect, so with enough excess cloth to hide his lack of a face what difference does it make.

A skeleton in loose robes is underemployed, and thus reading a book in the lounge, but will rise to greet a newcomer if someone makes eye contact at him.

Is that badger a pet? A wizard's familiar? It seems intelligent at least. Probably a familiar but you should still be polite.

"Hullo " - Sir? Lady? How do you tell with a badger? He should learn - " Ms Thackeray, would you introduce me to your new acquaintance?"

"Of course, Mr Sadegh. This is Harià, a free-willed undead badger, to whom we are considering extending membership. Harià, this is Mr. Sadegh, who is likewise a necromantic construct, I believe- Haria used to serve the Lich Eriape, until very recently."

"Hello Sir!"

"Hullo, Harià!" - used to serve a lich? should he offer condolences for the loss or congratulations for her freedom - "Was Eriape kind to you? The brotherhood has other powerful magicians if you would wish to seek a new master, though I find being one's own master the better side of it. Do you intend to remain in Osirion long?"

"I would not Call it Serving- Eriape and The Badgers were Friends Mostly. I think now I will Live as an Independent Badger of Business here in Osirion. I am Hoping that the Other Badgers make it Here, so we can Reestablish our Magic Item Production. If I have to Do it All myself, it will be Slow, even though I am Third Circle. How long have You been Here?"