Otaris is a NPC ally you can find during the mission Talk to the Circle from Vince Dubrowski (CoV, levels 20 - 24). He is one of the Circle of Thorns mages you are suppossed to talk to. He will be fighting a Foreman when you find him first, and must be freed so he can help you. Once free, he will follow you and will attack any Scrapyarder in his aggro range. Be warned that a wave of Scrapyarders will attack him after you rescue him. During my mission, Otaris spawned as a Lieutenant of the mission owner's level.