Seiya Kou: Leo (July 23rd to August 23rd)
The ruling planet for the sign of Leo is the sun (which influences masculinity and free will). Drama, pride, and commanding leadership are characteristics ingrained in Leo. This attention-getting sign gives a royal, classy air to those born with it. Favorable aspects enable Leos to express themselves in ways which draw respect and admiration, while negative vibrations influence Leos to put on too much of a show, and demonstrate a great deal of arrogance. Leo is a sign concerned with creativity.
Leos are born leaders, natural warriors, and possess many attributes associated with nobility. However, they can sometimes be tempermental.
The sign Leo is associated with the element of fire, and objects with gold, yellow, and red colors are auspicious for Leos. The glyph for the sign of Leo is a representation of a lion's tail, which you can see pictured to the left.
The idea that Seiya's zodiac sign is related to the sun meshes nicely with the idea that the Three Lights represent the Shinto San Hikari, in which case Seiya would represent the sun. It should also be noted that Mamoru Chiba is also a Leo.
Taiki Kou: Gemini (May 22nd to June 21st)
The sign of Gemini is ruled by the planet Mercury (which influences thinking, planning, speaking, and communication). This sign has an active energy revolving around diversity and change. Geminis know how to express themselves in many different, new and exciting ways. The positive side of a Gemini includes an adroit thought process. Geminis are good communicators and can easily understand others. Difficult aspects of this sign make the negative Gemini inconsistent, and unable to pursue a course of action long enough to derive any benefit from it.
A Gemini can sometimes seem like he or she has "two personalities," or at least as if he or she goes through some extreme moodswings from one moment to another.
The sign Gemini is associated with the element of air, since air is formless, mutable, and adaptable. Auspicious colors include yellow (like Taiki's suit), lavender, violet, and green. The glyph for the sign of Gemini is a representation of the two twins, Castor and Pollux, which you can see pictured to the left.
Yaten Kou: Aquarius (Jan 21st to Feb 18th)
Aquarius is ruled by the planet Uranus (which rules detached, impulsive, and unconventional people). Aquarius is a sign which relates to freedom, independence, and breaking new ground with progressive thoughts and ideas. Uniqueness and inventiveness are given those born under the sign Aquarius. An Aquarius can easily make friends, but is also easily prompted to disdain rules and boundaries, and tends to act impulsively. Aquarius is a sign mainly concerned with doing things in its own special way.
An Aquarius is a stable individual who is resistent to change imposed by others. Aquarians tend to be human and compassionate. (Remember that in the manga, Minako's "Three Lights Journal" noted that Yaten knew a lot about wildlife.) They have a gift for perception, especially where human emotions are concerned.
The sign Aquarius is also associated with the element of air, since air is formless, mutable, and adaptable. Auspicious colors include blue (like Yaten's suit), aquamarine, and green. The glyph for the sign of Aquarius is a representation of waves of water, which you can see pictured to the left.