Took me some time to realized but Aire doesn't have the golden color anymore. Writ of Exemption can be used on her.

Don'k know if it's a bug or a new feature.

In 11.0c, her unique tag was commented out. In 11.0d the unique tag is uncommented. I haven't got to her im 11.0d yet so I can't verify that is unique again but I assume so,

I'm playing .11.0d but my save maybe 11.0c at some point can't be sure too many updates recently.

I have made her a servant with a scroll.

The servants seem to keep also their trained slave bonuses which is cool.

Sadly, they don't have any training as a Servant. Even a combat slave isn't trained for combat as a servant. Apparently it's the same for a date skill even if the former slave was trained for it.

I see the same thing.  

It can make sense to me in that the guild leaders know Aire's attitude towards the rebellion (I assume they learned that when discussing Anastasia).  Also Aire just isn't that important a figure.

They wouldn't accept freeing Anastasia, as the elves wouldn't accept freeing Heleviel, but if the Mayor wants to free some random elven servant... meh.

This particular feature (or bug) is not present in the most recent version.(11.0e) Though it might occur if you loaded a save from a previous version.