Sinner whose threat level assessed to be S-Rank. Was a member of the Black Ring Expeditionary Force. Joined the expedition while working at the research institute. While approaching the Perishing Star, she discovered anomalies, became mentally corroded and lost much of her human characteristics. Has strong passion for both the truth and the unknown. Strong interest in astronomy and the Perishing Star before getting completely corrupted by contamination, infatuated with the night sky and you.