The "pledge" was a student at Vault-Tec University that pledged himself to the Pi Kappa Mu fraternity.
Background[]
The pledge and his friend Max Posey were locked in the laundry room of the Pi house during a party as a final initiation test for the fraternity. The two were given Nukashine - the pledge dumped it out, while Max drank his cup. Both sets of remains are found in the basement.[1]
Appearances[]
The pledge's skeleton appears only in Fallout 76, introduced in the Wild Appalachia update.