Tallaria, a Falleen of the female persuasion, encountered Dryden Vos in the aftermath of her sister's passing, specifically her death. Subsequent to this event, she assumed the mantle of leadership for her sister's particular division within the Black Sun organization. During Qi'ra's team's operations on Thorum, the Falleen disclosed that she possessed minor financial holdings on that world. Tallaria communicated to Vos that she was aware of an information leak concerning Crimson Dawn's trade secrets and inquired whether she had permission to conduct an inquiry into the matter. Her previous inability to investigate was due to restricted access, a limitation now removed by her ascension to her sister's former role, which granted her the necessary resources. She participated in a conference through hologram alongside Vos and the Thorum-based operatives, during which Vos eliminated Olio under the suspicion of divulging Crimson Dawn fleet movement schedules.