Luckily, Long was actually quick on the uptake, as we formulated the final plan on how to lessen the danger of the second floor by a great amount.
Since I couldn't simply fool them normally, especially if I appear out of nowhere, I decided to take over the identity of the shadow assassin turned-demon who was forced to enter the gate to hide from a serious threat.
That would be pretty much what happened had I let him escape, and less than a month has passed since then, so unless they had direct contact with the outside corruption forces hidden in the Light Association the story should add up.
As for why I didn't open them a path to the outside? Why I don't remember much info? Why is my aura human-like?