2nd Floor Administrator

The Second Floor Guardian is the unnamed Guardian of the Second Floor. It resembles a gigantic grey eel. It first appears in the story when it makes a contract  with Baam allowing him to use Shinsoo.

Plot
The guardian asked Baam what he was looking into so deeply. He then asked him if he wanted to make a contract, or fight with him. When Baam replied that he wants to make a contract the Guardian looked at him to see if he is worthy to use shinsoo. It then said that he looked tasty, smirked at him, and formed a contract.

After he was done making a contract he left with the cryptic comment "But remember ye who climbs the tower, this is not your power but your shackle. Always remember." (Chapter 29).

Later, Baam returns, asking the Guardian to prepare a test specifically for Irregulars. In exchange, he grants his wish of letting the rest of the Regulars pass even if Baam himself fails the exam.