According to what Elora had told Evan, the groups of monsters attack the pillar of light every few months in order to get inside it.
Only during the time of the monster attack does she stay near the pillar of light; otherwise, she spends most of her time in her cave abode, sleeping.
After learning that Elora usually stays in her cave and goes to the pillar of light only during the monster tide, Evan thought she might know a safe route that allows her to travel between her cave abode and the pillar of light.
After all, just looking at the hundreds of groups of monsters in the centre area of the first layer, Evan was sure that without a hidden or safe route, it would be impossible for her to go back and forth between her cave abode and the pillar of light without encountering the monsters.
But when he talked to her about this matter, Elora suddenly disappeared and came back after a few seconds.