Poseidoness

Poseidoness is the queen of the northern seas and the guardian of the Silver Orb.

Trivia

 * Out of all four of the Guardians of the Directions, Poseidoness is the only one Luka can actually defeat without exterior assistance. Kraken is defeated by Luka's superpowered angel side when Alice puts Luka to sleep, Sphinx is an unwinnable fight, Yamata no Orochi is sealed by Tamamo.