XB-55

XB-55 is an Enclave Sentry Bot in the Enclave research facility.

Background
XB-55 is a security unit programmed by the Enclave to protect SODUS from any who would try to harm her. When the Vault Dwellers of Vault 76 - accompanied by Knight Daniel Shin and Paladin Leila Rahmani - enter SODUS's chamber, the AI will upload its programming into XB-55 and fight the trio.

Quests
Over and Out: SODUS uploads herself to XB-55 and acts as the end boss of the quest.

Appearances
XB-55 appears