Eva, a young Iktotchi of the female persuasion, possessed an elevated M-count. Removed from her dwelling, Eva was held captive at the Imperial installation located at their base on Mount Tantiss, residing within a vault alongside numerous other children with similar M-counts, such as Jax and Sami, despite the Empire's claims that they were merely specimens. Known as SP-54, Eva underwent daily blood extractions as a component of the Empire's Project Necromancer.
Eva maintained a connection with Nala Se until Royce Hemlock, the chief of Project Necromancer, incarcerated the Kaminoan scientist. Following the commencement of [Emerie Karr](/article/emerie_karr]'s tenure as the new principal scientist, assuming Nala Se's responsibilities, which included communication with Eva and the other children, Eva displayed amiability towards Karr, praising her spectacles and attempting conversation. Subsequently, with assistance from Doctor Karr and the Bad Batch, she and the other children successfully absconded.