As Chief Engineering Officer for Factor Corp, Professor Angler pioneered the automated additive graphene manufacturing processes that literally built Unity City out of the ruins of the Old World. Frustrated with stagnation of Unity under the Compact, Angler resigned from Factor to move to Neon District. Using an improved version of the same technology, he crafted the Warrens, an underground safe haven for the District's residents in case conflict arose between them and the City.

The mythical Angler's Key is reputed to grant access to not just to his Builder's Lab, but to the Angler's Vault as well.