Touka Miyashiro is the main protagonist of the visual novel series 'Shirotsume Souwa'. She is a reserved and introspective girl who finds herself drawn into mysterious events surrounding the Shirotsume mansion. As the story unfolds, Touka becomes entangled with the supernatural elements of the mansion and its residents, uncovering secrets about her own past. Her quiet determination and thoughtful nature make her a compelling lead, driving the narrative forward as she seeks answers and forms bonds with other characters.