Isaacs

 was a pre-War resident of Boston. A CIT student, Isaacs ordered a shipment of Daytripper, X-Cell, and a palette of Mentats from a dealer at Sanctuary Hills. The reasons are unknown - the dealer speculated he was doing crazy experiments, dealing to the other eggheads, or on the verge of a nervous breakdown.

Appearances
is mentioned only in Fallout 4.