Riku Hayashi is a 16-year-old aspiring Demon Slayer with a unique appearance marked by his wavy long white hair, blue and gray eyes, and pale complexion. Living in a world where demons stalk the night, Riku is driven by a desire to protect the innocent and seeks to honor his family's legacy. Though he initially appears aloof to others, those who get to know him find a young man with great compassion and introspective wisdom. He trains diligently, specializing in water-based breathing techniques. An affinity for nature inspires him to go on meditative walks and stargaze, bringing him peace amidst the turmoil of his dangerous calling. Riku's journey is not only one of mastering his skills but of unraveling the mystery behind his family’s connection to the demon realm. His story unfolds in a world beautifully depicted in the Demon Slayer universe, where courage and resolve are as sharp as the blades used to defend against the night’s terrors.