Keryha, a Sith female also recognized as a Sister of Sorrow, belonged to the Infernal Council. This council consisted of Sith who were subjugated by Soa, the Rakata warlord, and subsequently confined alongside him within the Eternity Vault located on the planet Belsavis.
The character Keryha, the Sister of Sorrow, is featured as an adversary during the Infernal Council fight within the "Eternity Vault" Operation. This operation is part of the massively multiplayer online roleplaying video game Star Wars: The Old Republic, which was launched in 2011 by BioWare. Specifically, Keryha is present exclusively in the sixteen-player difficulty settings of the operation.