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XB-55 is a security unit programmed by the Enclave to protect SODUS from any who would try to harm her. During the destruction of the facility XB-55 was presumably left inactive. In 2103, when the Vault Dweller 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.
Interactions with the player character
|This character is involved in quests.|
Over and Out: SODUS uploads herself to XB-55 and acts as the end boss of the quest.
|Apparel||Weapon||Other items||On death|
- Events of Over and Out.