Ruka Kayamori is a central character in the anime series "Heaven Burns Red." She is portrayed as a resilient and determined protagonist, known for her unwavering spirit and leadership qualities. As a member of an elite group tasked with defending humanity from formidable extraterrestrial threats, Ruka serves as a beacon of hope and inspiration to her teammates. Her character is deeply layered, showcasing both vulnerability and strength, as she navigates the challenges of battle and personal growth. Ruka's journey is integral to the series' exploration of courage, friendship, and sacrifice.