Machi

In June 2006, Machi joined a carbon monoxide suicide party in the ghost village of Hinamizawa. Her reasons for dying are unknown, however it is hinted that it involves the deaths of her family. Since the village was called the "land of the dead", she hoped that she would see the ghosts of her dead family members, and is disheartened to the idea that the village would only house the spirits of the villagers.

(Source: Higurashi No Naku Koro Ni Wiki)