The Andromeda Cloth represents the Andromeda Constellation. The constellation is based on the myth of Andromeda, an Ethopian princess. Her mother, Queen Cassiopeia, had boasted of being more beautiful than the 50 Nereids, sea nymphs and the daughters of the god Nereus. When they learned of Cassiopeia's claim, they complained to Poseidon, whose wife was also a Nereid. In retaliation, Poseidon sent a sea monster, Cetus, to ravage the kingdom. When Cassiopeia's husband, Cepheus, asked an oracle what could be done to save his people, Poseidon demanded that Andromeda be chained to a rock as a sacrifice to him, to be eaten alive by Cetus. The chains from the Andromeda Cloth are said to be the very same chains used to bind the mythological character in the story. Luckily, Andromeda was rescued from death by the hero Perseus, who fell in love with her while returning home and offered to free her if her parents would allow him to marry the princess.
Having gained the agreement of Andromeda's family, Perseus turned Cetus to stone with the head of the gorgon Medusa and saved the girl's life. However, when they returned to Ethiopia, they were met by the angry Phineus, Andromeda's uncle, who had been engaged to her before she was offered as a sacrifice. Outnumbered by Phineus's men, Perseus turned all of them to stone and married Andromeda, remaining with her and their son in Ethiopia for a year before going back to his own home, Seriphos. Andromeda accompanies her husband when he goes to save his mother Danae from being married against her will, and becomes queen of Mycenae when Perseus switches rulership of Argos with the former Mycenae king. After their deaths, the gods placed Perseus and Andromeda in the sky as constellations for their heroism.
One of Perseus and Andromeda's descendants is said to be the hero Heracles.
The chains of this Cloth are legendary for their durability as well as defensive nature, and have only been completely shattered few times. They are also renowned for their great length, as they can be extended far enough to reach light years away. Whenever the Andromeda saint is faced in a dangerous situation, the chains are charged with negative energy, and they released lightning shocks of at least 10.000 volts, as when Unicorn Jabu grabbed them just before Ikki's reappearance in the Galactic Tournament, despite Shun's warnings; he refused to let go of the chains and received the electric backlash fully. Along with his comrades, Shun's Bronze Cloth has changed shape several times throughout the series.
The manga and anime both parallel each other in terms of the Andromeda Cloth's evolution (although, it should be noted that the Cloth received one extra repair in the anime; however, it did not change shape after it)
- Early/Kyū Cloth: The Early Cloth is the first version of Andromeda Cloth.
- New Cloth: The New Cloth is the second version of Andromeda Cloth, it has been repaired with the blood of Gold Saints after the Sanctuary Arc.
- Final Cloth: The Final Cloth is the third version of Andromeda Cloth, it has been repaired with the Athena's blood before going to the hell.