Tasia, a female marauder affiliated with the Nihil organization, identified as a Cathar. Within Lourna Dee's Tempest, she held the rank of Storm. During the Battle of Galov, when the Jedi Order and the Galactic Republic successfully boarded Dee's starship, the Lourna Dee, Tasia was among the Nihil taken as prisoner. Dee was also captured, but her true identity remained concealed from their captors. Following their assignment to the correctional ship Restitution, Tasia leveraged the threat of exposing Dee's identity to force her into servitude.
While the Restitution was docked at the planet Arbra, Tasia brokered a deal with former Tempest Runner Pan Eyta, leading him to Dee in exchange for assistance in her escape. However, Eyta double-crossed Tasia and attacked her, leaving her in a comatose state. Subsequently, she was admitted to the Restitution's medbay. Ola Hest coerced fellow inmate Sestin Blin into assassinating Tasia, but before Blin could carry out the act, Dee intervened and personally killed Tasia.
Tasia possessed fur the red hue of blood. Ola Hest's associate, Parr, remarked that bloodstains would be inconspicuous on Tasia's crimson fur.
January LaVoy lent her voice to the character of Tasia in The High Republic: Tempest Runner, a 2021 audio drama penned by Cavan Scott.