Secrets
From IdleOn MMO Wiki
Warning: This page contains spoilers.
There are multiple secrets that are unlocked by performing various feats in the game. These secrets can range from simple bonuses to new classes. This page will list all found secrets and how to unlock them.
Secretkeeper
The Secretkeeper is a secret character, only found in the tutorial area. They give you one quest, which requires you to get a Secretstone , which is the only other item you can craft in the tutorial. If you give the Secretkeeper the secretstone, they will give you a quest completed in the codex and their text, a secret code. 3-6-3-9-0-Blue
There is no further completion in this quest line as of right now.