We all heard that KINMUNE is Ayrenn. I, however, think that KINMUNE isn't really Ayrenn herself, but rather the armor she is wearing the whole time. Let me explain:

First, KINMUNE means "Kinetically-Interlinked Nirnian Multi-User Exoform". "Kinetically-Interlinked" means that its movement is linked to its user, "Multi-User" means that it can be used by multiple people and that it can adapt to different people. This does really sound like an armor, or something that somebody can wear on their body (an Exoskeleton).

Apparently, KINMUNE also lets people wear her to control those people:

"Over time, Kinmune earned many names and titles as her new visitors took their counsel. She was the Oracle Iridescent, spoken of in the Green Tablet Steps of Jhunal. She was the Witch of Wire and String, able to allow the Sons and Daughters to see through her eyes into the myriad secrets of post-kalpica transmeditations. Perhaps most famously, she was Kinmune the Doom of the Dumb Old Giant, because for all the minds that she let wear her body, none escaped in whole thereafter, even those with blood of the karstaag. Kinmune always took a portion of her proxies’ power and mystery."

-http://www.imperial-library.info/content/kinmune

So, it's known that KINMUNE lets people wear herself, which means that she could either become an Exoskeleton, or that she already is an Exoskeleton. Now look at Queen Ayrenns http://img1.wikia.nocookie.net/__cb20140220004446/elderscrolls/images/e/e5/Queen_Ayrenn.jpg in ESO.

It's Altmeri style armor, and it could be made out of Ebony, but I think that it just looks so... odd. Similar to Ebony, but not really Ebony.

So, KINMUNE took control of Ayrenn as soon as she began to wear her. Ayrenn most likely didn't know that her armor was KINMUNE and not a generic armor. KINMUNE also seems to be somewhat power hungry, and it would make sense for her to try to possess the Queen of Alinor.

This would also go with what Paul Sage says about Ayrenn:

"But no I don't think I would say Ayrenn is from a spaceship, that's my personal take on it"

Ignoring that it's his personal take on it, he doesn't believe that Ayrenn is from a spaceship. But if my theory is right, then Ayrenn herselt isn't KINMUNE, but her armor is. Which means that Paul Sage is technicly right, because it wasn't Ayrenn which came from a spaceship, but her armor.

So, does my theory make sense?

I've considered the Eye of Magnus as the 9th mining drone as the vessel that brought her back to the Merethic. Ayrenn/KINMUNE itself is what I consider to be an ayleid replicant.