Interesting, funny enough there is a custom companion in a very similar vein to this one called Nebarra Nebarra’s not an ex-Thalmor, but he is a veteran of the Aldmeri Dominion’s War with the Empire. He’s now a sellsword. He is quite quest-aware and has custom integration with other popular custom companions like Lucifer, and Xelzaz. This mod isn’t out yet, so if you wan’t something like it I would give Nebarra a shot.