With Us or Against Us: Rika's father took a neutral situation during the dam conflict and faced almost as significantly contempt for it as the Hojos for actively supporting the dam. Ooishi: Oh, he's the foreman of the principal construction site at the Hinamizawa Dam. Keiichi is the Naïve Newcomer to Hinamizawa and has to be allow in on what is likely on with his friends or how the village operates.