Audio narrative about elves or something?

A while back, I was taking an Uber home from work and the driver was playing an audiobook or Youtube video or something through the car speakers. I should have just asked him what it was, but I got really shy, so I jotted down whatever names I could make out and tried to look it up once I was out of the car. Unfortunately, no such luck...

Here is what I heard: there were characters named Tessia, Ethan, and Eva. There was something called an Omniverse as well. IIRC, Tessia and Eva were both elves and Ethan was a human, and elves had previously been enslaved by humans? My driver's car had a little screen that displayed the name of the audio file playing, and it said "E403 Playing of a..." (trailed off because there wasn't enough space). I assume this is an episode number and name.

I dunno, it's a long shot because it seemed like a pretty obscure thing and I don't remember much, but I would like to know just to put it out of my mind. I'll comment with any more details my mind shakes up.

EDIT: And now I realize this subreddit is for finding products, not media! Whatever, I'll leave this up if the mods are okay with it.