Sister Hell is a significant character from the anime series Prism Ark. She is a formidable warrior nun who serves as both an antagonist and ally at various points in the series. Recognizable by her gothic nun attire, Sister Hell is known for her fierce combat skills and mysterious aura. Her complex character adds depth to the narrative as she often grapples with her own beliefs and the orders given by her superiors. Throughout the series, she challenges the main characters, pushing them to grow and evolve in their own journeys.