She started renting an apartment here and coming sleeping over every night. Chiaki herself said that it was for "economic convenience!"
Although Seiji wanted to comment on it, it was indeed economically convenient compared to purchasing an expensive personal barrier.
The night of one hundred demons caused its greatest harm on the third night due to the Spirit Worlds' appearance distracting all the Spiritual Ability users. After the third night, all the Spiritual Ability user factions aggressively took steps to contain the demons in order to prevent the situation from going out of control, so that degree of harm to ordinary humans didn't happen again.
As all the factions took measures, the overall safety improved. However, there would still be demons along with victims since the night of one hundred demons couldn't be stopped… it was unknown if it even could be prevented.
