Holger was a member of the Cult of the Crushing Wave during the Elemental Evil crisis.
Holger war der Vater von Dolf und somit der Großvater von Shagga.
Holger Marcalias was a member of the Interim Ruling Council. Most of his information has been lost to official record, though it was believed he was an Imperial Advisor. After the disappearence of Wyth Skellheim, Grand Admiral Thrawn and Dekan, the Director of Imperial Intelligence, attempted to install Holger as a puppet leader of the Council.