Sebille from D:OS2, just a badass and her accent...damn...
I actually wrote up a backstory and journal for my Div OS 2 main character (I was playing co-op with my brother online, who did the same, so that we could really get a feel for one another's characters and headcanons).
Basically my character was a middle-aged human ranger who was obsessed with poisons and grandeur (having been raised by a pairing of noteworthy bards - a trade he rejected, but not before tasting fame). At first I fully intended him to become the Divine no matter what, even if that meant purposely impairing my brother's ability to do so, because this guy felt he was the right fit for it from the get-go.
By the time we made it to Arx, the script had been flipped. Sebille was my AI companion (my brother's was Ifan) and by then, our party's perspective on Divinity had changed pretty significantly. For my MC, Sebille had revealed herself over time to be the only being he'd ever met that was truly worthy of Divinity, and he'd gladly be her valiant underling until the day that death took him.
Sebille is just the best.