Misaka 10777, among approximately 20,000 clones of Mikoto Misaka engineered for the Level 6 Shift Project—a program seeking to elevate Accelerator to Level 6 through systematic clone extermination—defied her predetermined demise. Surviving the experiment, she was relocated to a Russian organization, operating autonomously beyond Academy City’s oversight. Her path intersects with Mikoto in Russia following a supersonic plane’s destruction, after which she pursues self-directed objectives upon her affiliated group’s evacuation. During the Russian conflict, she allies with Mikoto to neutralize nuclear threats by dismantling Russian and Academy City forces. Their collaboration escalates as they commandeer a VTOL aircraft to infiltrate the Star of Bethlehem, aiding Kamijou Touma’s rescue. Sharing standard Sister traits—accelerated maturation, combat training, and hive-mind connectivity—she wields Level 2 electromaster abilities, weaker than Mikoto’s, alongside firearm proficiency, notably employing an AK-47 during operations. While retaining the clones’ characteristic vacant gaze and muted affect, she exercises independent agency post-experiment. Her narrative centers on transcending the project’s lethal purpose, engaging in geopolitical strife that mirrors the clones’ existential and ethical quandaries. Though her personality remains subdued, her actions prioritize self-defined goals and tactical alliances during global crises. Her development within the Russian arc underscores a transition from expendable asset to autonomous operative, marked by pivotal missions alongside Mikoto.