Chen Mo did not want to kill anyone, but if his Fear Value was insufficient, there would always be some people he could not save.
He had considered sending Kayako and Sadako out to frighten people. Whoever they were, he would raise his Fear Value first.
However, he was trapped himself right now. His phone had not proved useful as he had expected, and a terrifying shadow lurked in this eerie space. How could he dare let Kayako and Sadako leave?
Perhaps the reason that ghost had never appeared was because two Vengeful Spirits were holding down the fort.
The previous experiment had also shown that Room 1904 targeted only him. Sadako and Kayako could enter and leave freely. Could it be that the ghost wanted him to send the two spirits away?
Chen Mo was terribly conflicted and regretted getting involved in this mess.
"Kayako, go frighten all my employees once. Don't kill them." In the end, Chen Mo sent Kayako out.
He could not let a Vengeful Spirit frighten random passersby, because only people he knew could have their lives preserved with Fear Value.
He had records of everyone who visited his haunted house, and he spent two points on each of them every day to keep them from dying.
If he let Kayako enter some building at random to frighten people, it would not be frightening them—it would be killing them.
Chen Mo did not know whom Kayako might encounter, and he could not protect them all. Unless he instructed Kayako not to kill anyone she encountered, but such an all-encompassing command came at a great cost. Besides, Chen Mo still would not know who those people were. What about the next day? And the day after that? Kayako might not kill them today, but she could