Glowing One

Glowing ones or luminous necrotic post-humans are ghouls who have absorbed so much radiation that they literally glow with its excesses. They have become living conduits of radiation to the point that radiation not only heals their combat injuries, but can be forcibly released from their bodies. They are most often considered outsiders even by other ghouls. Glowing ones also emit radiation involuntarily, so they can still be dangerous to normal humans even after their death.

Even more deadly in Fallout 4, a glowing one isn't only stronger than a normal feral ghoul, its radiation burst it is able to reanimate nearby fallen feral counterparts.

Background
While there are many glowing ones that kept their normal human intellectual abilities in New California, it seems that nearly all of them in the Capital Wasteland and the Mojave Wasteland have become feral. One notable exception is Jason Bright at the REPCONN test site.

The Capital Wasteland glowing ones can emit a wave of radiation at will from their bodies, which they use to heal themselves and any surrounding ghouls while damaging their enemies. They are the alphas of the feral ghouls and others seem to follow them, as they are attracted to the lethal doses of radiation the glowing ones emit from their bodies.

In the ghoul settlement of Necropolis in New California, the glowing ones lived in the remains of Vault 12, and there was an animosity between them and the "normal" ghouls led by Set, who inhabited the ruins of the town. After Necropolis was overrun by the super mutants, the glowing ones who left the town lived much more harmoniously with the other ghouls (not to mention normal humans and super mutants).

There appear to be several glowing ones in the nuclear plant in Gecko, working in the reactor area, most notably Hank. If the Chosen One fixes the reactor's radiation leak, the ghouls in the plant (not just the glowing ones), will comment on how the plant feels "chilly."

In the Underworld, the doctor of The Chop Shop seems to be using glowing ones as a method to heal the ghoul population. He has two of them, Meat and Ethyl, locked in a pen next to the clinic. They can not be visited without the use of console commands.

In Los, the glowing ghouls are among the members of the Church of the Lost, a ghoul cult dedicated to protection of the Secret Vault. Interestingly, they are less affected by radiation than their comrades from the Capital Wasteland and New California.

Biology
The distinctive luminescence that is the trademark of the glowing one can be best attributed to an unusually high amount of radioactive material that builds up in the bloodstream and muscle tissue of a typical ghoul. Sometimes, upon the transformation into a feral ghoul, the neurological systems of the body cease filtering these particles from the blood and tissue, instead causing them to build a distinctive bio-luminescence that is a characteristic of the "glowing ones." In daylight they simply appear to be incredibly pale feral ghouls, but in darkness they glow with a vivid yellow-green hue, their opaque skeletons clearly visible as in an X-ray. Approaching a deceased glowing one can cause minor exposure to radiation.

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