Michiru's intellect is the greatest of her assets. Unlike her partner Haruka, Michiru considers the implications of her actions before going into action. She also has a very calm personality. She is very skilled at painting, swimming and playing her violin.

As Sailor Neptune, she is also very serious, and like Haruka, willing to die for her cause. However, she does not want to see Haruka get hurt, and has often compromised her position to protect her partner. Haruka and Michiru's relationship if far more powerful throughout the Manga.