"I wished I'd killed Aletur sooner. Brave warrior. Didn't deserve the life of an Unclean."— Skular(src)
Aletur can randomly spawn in the Ruins of Sescheron. It appears that he dual-wields two huge blades that do not visually match any in-game weapons.
Like other Barbarian cannibals, Aletur has very high melee damage, huge Life pool and moves very quickly. In addition, he has Leap skill that deals damage upon landing, and summons multiple Pack Hunter wolves at his side in the beginning of combat. He has no monster affixes, though.
The flavor text of the Bracers of the First Men is narrated by him.