Gills' nickname came from his strong swimming ability, having the fortitude of a fish's gills. Alongside Fishbones and Blackeye, Gills was ordered to set up a base at Ohio River Adventures, where they could coordinate the trade of mirelurk products such as eggs and softshell meat.
While making the trip southwest, Fishbones woke up one night to Bruiser "beating the tar" out of Gills, who was on night watch. Bones figured that he had found Gills' replacement, as Gills could no longer walk from the beating he received.
- Vault Dweller: "What's up with Bruiser? He's not real friendly, is he?"
Fishbones: "Sure as hell ain't. We were travellin' out here to get this little gig operational. It was me, Blackeye, and another fella Gills. Boy, could he swim. Well, Gills was watchin' guard one night. Woke up to Bruiser beatin' the tar out of him. Figured I found my replacement. Gills couldn't walk anymore."