Kaioh Michiru/Sailor Neptune

Michiru usually means "to become full" or to be completed.
The characters kai and oh stand for "sea king", an obvious reference to the Roman god Neptune or the greek god Poseidon, who is symbolized with water. As opposed to Mercury, who seems to have water-based powers, Neptune has, more specifically, power over the oceans. Neptune and Pisces stand for creativity, and acute emotional sensitivity towards spirituality and the arts. Pisceans rely heavily on their super-ego and thus are able to elevate themselves to understand love and laughter on a higher plane than the others. They are intense dreamers, and often find themselves leaving reality to go into their own little world.

(Roman Neptune; Greek Olympian Poseidon.) These two are the god of sea. He may be derived from the Etruscan god of water, Nethuns. Husband of Salacia.  Unfortunately, the Roman god Neptune is less popular, unlike Poseidon. Sailorneptune�s power is connected the power of water but its deep sea unlike Mercury, the water turns into ice. He is the son of Saturn and Ops (Cronus and Rhea in Greek) and brother of Vesta, Jupiter, Pluto and Juno (Hestia, Zeus, Hades and Hera in Greek.) Neptune�s counterpart Poseidon attributes the animal dolphin. In addition, one of Poseidon�s attributes is the trident, which originates Neptune�s sign. He is also the god of horses and earthquake. Like his brother Zeus, he has many love affairs; I think that�s where Michiru�s flirty attitude came from.

His festival, the Neptunalia, was held on July 23, the height of the midsummer drought, probably a reference to Neptune's original role as a god of the fresh waters essential to agriculture. Otherwise, Neptune's representation in art and literature was essentially identical with that of Poseidon.