Kaiou Michiru is a very calm, sweet, intelligent girl (much like Ami-chan). She appeared in the series with her lover and fellow senshi, Ten'ou Haruka. Michiru is a very skilled musician, specifically violinist. She has been in many concerts, and even opened for the Three Lights. She once even juggled a lemon on her violin while playing it.. .

Sailor Neptune is one of the outer senshi, meaning that she shows up to save the inner senshi's tail in the heat of a battle and then mysteriously disappears (though, in the beginning, Uranus and Neptune wanted NOTHING to do with the inner senshi. Their reaction to finding out that Usagi was Sailor Moon was priceless). Her attacks are water based: deep submerge, aqua mirror reflector, and Neptune violin tide (manga). Sailr Neptune is a carrier of a pure heart crystal, her talisman being the aqua mirror.