M. Thompson

 was a resident of Vault 76.

Background
Two days prior to Reclamation Day, Thompson stole a six-pack from the party's stores and drank it. As a result, he got drunk, was caught singing loudly during Vault 76's night cycle by Jill, and was put into the Vault's holding cell to sleep it off.

Appearances
is mentioned only in Fallout 76.