Yako Katsuragi is the main human protagonist in the anime series Majin Tantei Nougami Neuro. She is a high school student who becomes an unlikely detective after the mysterious demon Neuro Nougami forces her into a partnership. Despite her initial reluctance, Yako proves to be resourceful and resilient, often using her sharp intuition to solve cases. Her character evolves from a grieving daughter seeking answers about her father's murder to a courageous detective. Yako's dynamic with Neuro is central to the series, providing both comedic and dramatic moments.