Holmar Grahrk, a Devaronian, shared a profession with his relative Vilmarh: he engaged in smuggling, bounty hunting, and various other illegal activities.
Later in his life, Holmar collaborated with Villie in an effort to claim the reward offered for the capture of Quinlan Vos. This occurred as Quinlan searched for his Padawan, Aayla Secura, on the planet Ryloth. Holmar and Vilmarh successfully drew Quinlan to the location known as the Floating Rock Gardens. There, Holmar tried to assassinate Quinlan; nevertheless, before he managed to discharge his blaster, Vilmarh, who was concealed behind a large rock nearby, shot and killed Holmar with a blaster shot to the chest.