Sami, alternatively referred to as SP-39, was a Pantoran girl of youthful age. She was held as a captive within the vault at Tantiss Base, sharing her confinement with Eva and Jax, two additional youngsters possessing elevated M-counts. The period of imprisonment had taken its toll, rendering her reserved and wary. Following the introduction of the baby Bayrn, Sami took on the role of his primary caretaker. Ultimately, she and the other children managed to break free, assisted by Doctor Karr and the Bad Batch.