The swords will be people.

So this will be a weird one. A lot of predictions of the plot or general setting for TESVI involve the idea of the player collecting enchanted swords. This makes sense it fits the setting and it gives the gameplay designers a excuse to make weird and fun weapons. It a very safe guess.

Now I am going to add the crazy part. The weapons you collect will also be companions. Each weapon would have the soul of a warrior or other important person in it. You will be able to hear them well welding their weapon and you would also have the ability to summon their body so they can follow you around carry your junk and do all the normal companion things.

(They won't all be swords I expect one of each weapon type.)