Bain Massani is a human private security contractor turned kett hunter. He is the son of Zaeed Massani, whom he never met. He only knows him as a famous mercenary. Bain eventually quit private security because it bored him and joined the Andromeda Initiative. Bain traveled to Andromeda aboard the Nexus, and left the station after the Nexus Uprising as an exile. Since then, he has been traveling the Heleus Cluster and waging a one-man war on the kett.

Pathfinder Ryder encounters Bain in a kett bunker in the Presson Dunes of Eos, and Bain explains how to weaken the kett presence in preparation for a raid on the planet's main kett base.