"Gemini, the sign of the Twins, is duel-natured, elusive, complex and contradictory." A lot of the characteristics of the Gemini apply to either Miki or his sister and really the dynamics of their relationship. Miki represents the good, quiet side of the Gemini-helpful, charming, attractive, courteous, and thoughtful, while Kozue represents the other side-controlling, demanding, cunning, and childish. That isn't to suggest that these characteristics are exclusive. Kozue can be thoughtful just as Miki can be childish.

Unlike a Gemini who is good at many things but doesn't stick with them, Miki is able to be many things at the same time. Gemini people are also intelligent and love a mental challenge. Miki seems to be very good at math and it is indicated that he is taking college level courses. He has the strengths of a Gemini without the oscillations that plague others.

In love, Gemini people tend to be both passionate and cynically distant. Miki seems to be the passionate one with his deep love for his sister and his adoring crush on Anthy. Kozue is cynical about love and seems more content to "get what she wants" from her many dates than actually care about any of them.

Mercury is the planet of this sign, but this is the planet of childhood and youth with all of its graces and faults. In many ways, both Miki and his sister are still those children in the garden who haven't been able to grow.

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