Luke Husky was a member of the Husky family at Haddock Cove prior to the Sole Survivor's arrival in 2287. Together with the rest of the family, he helped build their outpost using scrap materials from the houses surrounding the area. Luke was occassionally assigned to catch fish and cook, along with standing watches at night. He would also help Bray Husky when he had trouble recording his holotapes.
Eventually, Luke would be killed in an attack by mirelurks that had been attracted to the dead fish and chum around the family's outpost. Bray relates with horror how he witnessed Luke being pinched in half by the mirelurks in his last recording.
The following is based on unverified behind the scenes information and has not been confirmed by canon sources.
Bray Husky and the rest of his family are references to the WWE tag team known as "The Wyatt Family" which consists of Bray Wyatt, Erick Roowan, Luke Harper, and Braun Strowman. The Husky part of their names comes from the fact that Bray Wyatt was formerly known as Husky Harris before he left and came back as Bray Wyatt.