J. Daily was a resident of Vault 76.
Daily was one of Vault 76's original inhabitants. They had kept a stash of Nuka-Cherry in the Vault for over twenty years, during which time they rationed the bottles for themself. Not long before Reclamation Day, someone stole from the stash, which prompted Daily to leave a note on the personnel terminal, threatening consequences to anyone should they be caught.
J. Daily is mentioned only in Fallout 76.