Off to Boarding School: Shion, as witnessed in her flashback arc, was sent off to St. Lucia's Boarding School when Mion was erroneously specified an oni tattoo marking her as the following spouse and children head. If not for the doll, Mion wouldn't have poured her heart out to Shion, in switch restoking her repressed Yandere inner thoughts for Satoshi, primary to the functions of Watanagashi-hen and Meakashi-hen.