Hakufu Sonsaku is the main protagonist of the anime series 'Ikkitousen.' She is a high school student with a carefree and cheerful personality, often seen with a bright smile on her face. Despite her seemingly airheaded demeanor, Hakufu is a fierce and skilled martial artist, feared by many opponents. She possesses a dragon spirit, which grants her immense fighting power. Her role in the series involves battling other students from rival schools, each possessing their own legendary fighter spirits, as they vie for supremacy in the Kanto region.