Sean Webster

Sean is a powerful Neogean on Earth, and one of Zachs new allies in The 15 Keys 3

The 15 Keys 3:
Sean is present at The Kingdom's arrival, and see's him take Zach away. During the chapters on Earth he tells Anna to find a telescope, and tells Hopey to see if he can return to his homerealm, confusing Hopey, and then says never mind. He begins to raise an army of Neogeans in the school by telling them what they are, and prepares to attack the Gate when Zach and Kristine suddenly appear. He looks up at the roar from the Gate and then shows Zach the army of Neogeans, introducing him after that to Monica.

The 15 Keys 4:
Sean will appear in the fourth installment to the series, and has another important role in the Neogean army.