Amsa

Amsa is the God of the Seas and the only higher being in the world. It is also the letters (A.M.S.A.) that are displayed on the sides of the helicopters that the Outside People use to carry the characters back to the dnd world when they wander too far into the water.
"Brock has since spearheaded a project along with a few others to make a defense system for the island - it's been nearly a year since they started working on it, and its finally nearing completion. It's supposed to keep any "mutated abominations" from reaching us. Some aquatic robot that he calls “Autonomous Mechanical Stationary Armaments.” I'm not sure why, but he plastered the name on its forehead." -Lily Caspia