To see who is taking part in the Novice Network, hover over the sprout icon and select "Novice Network List." The list includes information such as each character's status as a mentor, new adventurer, or returner. It also shows the current number of participants.

Leaving the Novice Network
When certain conditions are met, new adventurers and returning players will be removed from the Novice Network automatically.
It is also possible to leave manually via the sprout icon, but it is not possible to rejoin without an invitation from a mentor.