Jason Masters
Jason Masters is credited as inker on 43 issues, penciller on 42 issues and cover artist on 1 issue in grailworth's catalog, 27 issues of them across 12 series we value. Characters first seen in issues they wrote or drew include Geena Drake.
Characters they introduced
Every issue
Avengers (2018) 1 issue
Batman Incorporated (2012) 4 issues
Batman: The Dark Knight (2011) 1 issue
Batwing (2011) 1 issue
Batwoman (2011) 1 issue
Bloodshot (2019) 2 issues
Detective Comics (2011) 1 issue
Guardians of the Galaxy (2013) 2 issues
Suicide Squad (2011) 1 issue
Wolverines (2015) 2 issues
Credits from the Grand Comics Database, CC BY-SA 4.0.