the dark brotherhood assassin follower. the only follower that will level up all the way with you and can't be killed. she will wear full nightingale armor - give her karliah's bow and you essentially have karliah's spirit with you. since she's a nord, high level nightingale armor means 100% frost resistance, letting you spam ice storm at her if you're a mage. also, her light armor means nightingale can reach the highest armor class in the game the easiest, if upgraded correctly, so you won't need to invest in smithing to keep her safe. she can use daggers - mehrune's razor will let her 1 hit kill dragon priests. can also use the giant club. since she can't be killed, if you want to play support, you can heal her and call to arms her. give her the windshear and she'll stagger people she hits, helping you protect yourself or your dog by redirecting their attention - without the need of a soul gem. the bow you give her will be equipped because she doesn't have one. a common bug is that followers use their own gear regardless of what you give them. can competently sneak. maintains a respectful dialog to you at all times.

the one from azuras shrine. as she told me that she doesn't know what to do now without azura talking to her, i just had to take her with me. and i do not regret it... that dmg.