The group known as the Scarlet Skulls was established during the Nihil pirates' occupation of the Outer Rim planet Valo. This crew consisted of the Jedi Ram Jomaram, Gavi, Kildo, Tep Tep, and the aspiring pirate Zyle Keem, all of whom sought to resist the Nihil's presence. Notably, their name was the same as that of the Scarlet Skull Cult, a group of child assassins.
The junior novel Escape from Valo, released in 2024 and written by Daniel José Older and Alyssa Wong, featured the Scarlet Skulls. This novel is a part of Phase III of the Star Wars: The High Republic multimedia project.