Consequent to her death, Sachiko became the sinister and murderous tyrant of Heavenly Host and used her fatality to ensnare innocent victims to secure their demises. Sachiko showed off that she doesn't want to just kill her victims in the line of fire, but wants to play with the victims, pretending to be their friends or letting them free just to kill them later, like an ordinary child would with their toys. She is typically accompanied by Yoshikazu Yanagihori, who brings and traps the victims for her. She first started trapping children in the school so her mother wouldn't be lonely, but eventually it became solely a source of amusement.

In the end, she is appeased, showing a much more tender character.