Sten the Ugly is a member of the Fighters Guild in Anvil. He is fairly hollow; his interaction are limited to making a remark about his nickname, unlike the rest of the guild members in Anvil, who offer varying services.
Anvil: "You notice all the Nords around here? It's partly because Nords like ships and sailing. Mostly, we're sick of freezing our asses off in Skyrim."