Haruka Koumi is a central character in the anime series Rail Wars! She is a kind and intelligent young woman with a gentle demeanor. Haruka serves as a member of the Railway Public Safety Force (RPSF), where her exceptional analytical skills and vast knowledge of trains make her an invaluable asset to the team. Despite her calm and composed nature, she is determined and courageous when the situation demands it. Throughout the series, Haruka's expertise and problem-solving abilities are crucial in ensuring the safety of the railway network and her team.