East River Spirit

"The power of Poseidon. He's a jerk, but he sure knows how to sweep pollution away."

- East River

The East River Spirit is the spirit of the East River. He dislikes Percy Jackson and is a rival of The Hudson River spirit. His river is also known to be very dirty and polluted

The Last Olympian
Percy asks him and the Hudson River Spirit to sink all the Titan ships and their allies that try to cross the rivers in exchange for half of the sand dollar each, that his father, Poseidon, gave Percy for his fifteenth birthday. After both spirits quickly agree, Percy splits the sand dollar between them. The East River Spirit calls Poseidon a "jerk", but acknowledges his amazing power to sweep pollution away. Holding their side of the bargain, both river spirits stop the ships and monsters from crossing, forcing Kronos to use a ground strike.