Ouka Shirayuki is a main character in the visual novel series Nitro Wars. Known for her cheerful personality and unwavering determination, Ouka stands out as a driving force within her team. Despite her youthful appearance and nickname 'Ouka-chan', she exhibits remarkable tactical insight and courage on the battlefield. Throughout the series, Ouka’s loyalty to her friends and her resolve to protect them become central to the story, making her a beloved and inspirational figure among fans.