Erandur

Erandur is a a male Dunmer. He's a priest of Mara, and can be found in the inn in Dawnstar. He's available as a companion, after you solve the problem of nightmares that bothers citizens of Dawnstar. During the quest he will reveal to you that he used to be a priest at Nightcaller Temple and by ending the nightmares he feels he will redeem himself. During the quest, at one point you'll have a choice whether to let him live, or to kill him. Obviously you can't kill him if you want him to be your companion. He uses destruction magic with one hand while welding a mace in the other, but at times he'll even use a bow.