Pen Jiami's Mirror Realm isn't maintained around the clock.
Lubao remembered that Pen Jiami likes to sleep, whenever it fell asleep, there would be a brief disappearance of the Mirror Realm.
But it would soon be awakened by a human called Mikaela to continue maintaining it.
So it just needed to seize the moment when the Mirror Realm disappeared to enter.
It recalled its own Beast Tamer discussing with her mentor that as long as one was inside the Mirror Realm, once it was maintained, the beings within would not be affected.
Its own Beast Tamer had also told it and Yaobao that to know whether the Mirror Realm was being maintained was simple. If sensing the position of one's own Beast Tamer from outside the Mirror Realm and the position is only approximate, or the sensed position keeps changing frequently, it indicates the Mirror Realm is between it and its own Beast Tamer. If they can always sense the precise position, it means they are not affected by the Mirror Realm.
