"Hello, Doctor. Allow me to once again express my gratitude to Rhodes Island for taking in me and my friends. I've had enough of a break working in Logistics, and I'd like to do as Zima and the girls do."

Prior to the Chernobog incident, Rosa attended a middle school in Chernobog City and served as the student council president.She joined Rhodes Island after the incident, and developed a very good reputation while working for the Logistics Department. She has now applied to be transferred to the front lines as a sniper operator.

A member of the Ursus aristocracy who attended a middle school in Chernobog, Natalya Andreyevna Rostova's good upbringing earned her a place as her school's student council president and an example for other students to follow. That is, until the Chernobog uprising changed everything – Natalya was forced to make difficult decisions when she and the other students were trapped in their school by Reunion during the chaos and helplessly witnesses their resulting plight, which she blamed herself for since then. Fortunately, Natalya survived the ordeal and led a group of survivors to survive in the now-devastated Chernobog, which includes Anna Morozova, Rada, Rosalind, and Sonya, but suffered from depression and self-loathing, as well as having occassional suicidal tendencies until they were rescued by Rhodes Island.Natalya has since lend her aid as the figurehead of the Ursus Student Self-Government Group with the codename "Rosa", serving for R.I.'s Logistics Department and as a field combatant utilizing a "siege equipment" in the form of a harpoon launcher to skewer hostiles from a distance.

CV Voice Actor: Reina Ueda