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Aries Taurus Gemini Cancer Leo Virgo Libra Scorpio Sagittarius Capricorn Aquarius Pisces
Scorpio Cloth Saints of Scorpio
The Scorpio Saints are ruthless and fierce, with a gaze that strikes terror into their prey. Because, above all, they are hunters, with a bloodlust that ranges from practical to psychotic. Their attacks are swift and precise, up close and personal, assuring a slow and agonizing death. Milo is the Scorpio Saint of modern times in the original Saint Seiya, while Kardia is the Scorpio Saint of the 18th century in Lost Canvas.

Scorpio Milo
Milo's battle cry is "surrender or die," and
his enemies would be wise to choose the former,
because he is a merciless, sadistic fighter who loves to
bleed people dry. His venomous stings inflict unimaginable
pain enough to drive lesser beings insane. He strikes first and  
asks questions later, which at times results in him torturing the
wrong person. But it can also be said that he does not care who
he's attacking, since he certainly enjoys the violence of it all.
However, Milo is far from being a dumb brute. He's a proud  
and noble warrior in his own special way. Although he's been  
known to let victims go out of respect for a friend, ultimately, his
concept of honor involves not holding back on an opponent. This is
shown in his treatment of Cygnus Hyoga when Milo accepts him
as a man. Likewise, Milo is very fair, and isn't afraid to admit
defeat or give praise. When traitor Gemini Kanon returns
to Sanctuary, Milo puts him through an agonizing trial
to test his loyalty before acknowledging him as
a fellow Gold Saint. Once his friendship
is earned he is a powerful ally.


Scorpio Kardia
Kardia was born with a heart that produced
heat beyond temperatures humans could withstand.
He suffered from terrible fevers, but the technique he
used to keep them under control was slowly killing him. He
  knew he wouldn't live long, but at least he could choose the
  time, place, and means of his death. Since he had no future,
  he lived for the present moment and reveled in the thrill of
  battle. His greatest wish was to fight an enemy who could
ignite his heart so he could go out with a bang. That's why
  he joined Aquarius Degel on his mission to negotiate with
  Poseidon, for what bigger prey was there than a god?
  Kardia was not disappointed by his decision, since
  it fated him to cross paths with 1 of the 3 Judges
  of the Underworld, Wyvren Rhadamanthys. He
could hardly contain his bloodlust, and when
  he told Rhadamanthys that his heart was on fire, the
  Judge realized too late that he meant literally. In
  his final attack, Kardia released the flames in
his heart, consuming them both in a
passionate blaze of glory.

Scorpio Techniques
Restriction Restriction
Scorpio's eyes turn orange and he shoots circular waves at his opponent, causing paralysis. It feels like a scorpion staring down its prey.
Scarlet Needle xx Scarlet Needle
This is Scorpio's signature attack. A blood-red nail grows out of his right index finger to act as a stinger, then crimson Cosmo energy gathers around the nail and shoots out as a poisonous needle of energy at his opponent.
Scarlet Needle xx Multiple Scarlet Needles*
Scorpio can shoot these needles one at a time or several simultaneously. Each needle corresponding to a star in the Scorpius constellation. As the poison from the stings spreads, it attacks the central nervous system, causing unbearable pain and gradual loss of the senses, so much so that most victims go insane or die before the attack can be completed. Scorpio usually gives his opponent the choice between surrender or death, but nobody ever listens!
Antares Scarlet Needle Antares
There are 14 regular hits of the Scarlet Needle, and their carefully aimed stings trace out the pattern of stars in the Scorpius constellation on the opponent's body. The 15th and final sting corresponds to Antares, the red supergiant at the heart of Scorpius, and is aimed at the center of the target's torso. Death is inevitable after being pierced by this attack, and the opponent is left to die in a free-flowing pool of their own blood.
Stop Bloodflow Stop Bloodflow*
Scorpio is able to reverse the effects of Scarlet Needle, and even of its deathblow Antares, by pressing a key point on the body that stops the massive blood loss.
Katakaio Scarlet Needle Katakaio Scarlet Needle
(Blazing Scarlet Needle)

This is an attack unique to Kardia, activated when his heart burns as literal flames. It draws on the heat and shoots it into his opponent's bloodstream, setting it on fire. Kardia is able to use this attack with either hand, but claims that it is more powerful using the left hand which is closer to the heart.
Katakaio Antares Katakaio Antares
(Blazing Antares)

As the heat in his body rises, so does Karia's Cosmo. After the 14 preliminary strikes of the Katakaio Scarlet Needle, he performs the culmination of his attack, represented by the star Antares. This 15th strike triggers his target's heart to be consumed in Scorpio's flames. Katakaio Antares can't be used twice, since Kardia burns up his entire life force in its execution.
Group Techniques
Athena Exclamation (Light) Athena Exclamation
The honor code of the Saints dictates that all battles must be one on one, but Athena Exclamation can only be performed by three Saints. It has the force of the Big Bang, and is so overpowered that Athena herself had it banned. However, Saints have been known to use it under extreme circumstances.
Athena Exclamation (Dark)
Supernova Sunlight*
The Zodiac constellations have long bathed in the light of the Sun, and the Gold armors that represent them have absorbed an infinite amount of sunlight. To perform this incredible blast of energy, all the Gold Saints focus their Cosmo into the tip of Sagittarius' arrow, thereby fusing their powers as one.
This attack was used to break through the Wailing Wall by bringing the full intensity of a star into the darkest depths of Hell. Although it is said that Athena Exclamation has the force of the Big Bang, Supernova is undoubtedly more powerful, since it utilizes the combined strength of twelve Gold Saints instead of three. It instantly disintegrates everything in its vicinity, including those who cast it, and sends waves of devastation rippling outwards. 
Aries Taurus Gemini Cancer Leo Virgo Libra Scorpio Sagittarius Capricorn Aquarius Pisces

Knights of the Zodiac

*This technique does not, as far as I know, have an official name. I just gave it a descriptive name.

Saint Seiya (also known as Knights of the Zodiac), all of its spinoffs (Lost Canvas, Episode G, Next Dimension, etc), all characters, art, and story is copyright Masami Kuramada. No copyright infringement is intended.
Credit for Restriction picture to SaintSeiyaPedia, and for the Saint Cloth picture to Pharaon Website.