|Stewart Clipper - Deceased - Suicide by explosion|
|Mother||Regina Clipper (Deceased)|
|Father||Mark Grist (Deceased)|
Stewart Clipper was the secondary antagonist of Volume 5.
10 years before such volume, he and 3 other people -- Ashley Twain, Cal Riggins and Desmond Row -- took out a boat belonging to the camp's owner. During the trip, the owner Mark Grist accidentally got killed by his own spear. The 4 made a promise to never tell anyone, symbolized by a promise knot pendant.
The first 4 Volume 5 chapters showed a man named the "Unknown Sailor" killing all these people (and even his own mother Regina Clipper). Stewart had realized that Mark Grist, the man he had killed 10 years before, was in fact his father. So in the final chapter, Clipper tried to take Twain hostage and recreate the experience only for him to be culminatively stopped by Mal Fallon and Natara Williams.