Have you seen the mod 'Interesting NPC's'? The author has recently added several voiced companions who comment on quests and locations (as well as having their original backstories that the mod was originally based around). I think there are 16, about six voiced and the others needing voice actors, Anyway, both the writing and voicing is top notch so if you're considering companions for Atvir to interact with it's definitely worth a look :]