The voice I imagine this character speaking with is actually very similar to the
"FemaleYoungEager" voice type, used by characters in-game (eg. Brelyna Maryon, Jordis, Jarl Elisif the Fair) shifted down by a half-octave. Initially playful, mildly sarcastic, and warm, Lielle will experience character progression through the course of the series, as she confonts the challenges of living in Skyrim, and comes to terms with the awakening of her powers as The Last Dragonborn. The pastebin link details more of her character make-up and biography.