The Wolf Bronze Cloth is the cloth of the Saint Nachi in Saint Seiya, Junkers in Saint Seiya: The Lost Canvas, and Haruto in Omega. It is of the lowest class of the cloths that Athena’s Saints wield, the Bronze Cloth.
The constellation of Lupus was originally connected to the constellation of Centaurus, and not a named animal until many years later. It was associated with said constellation due to being a hunted prey that was killed, or about to be killed.
Nachi trained to be a Saint in Bomi Hills, Liberia during the period the other orphans were. The cloth was likely kept in this area by his master to be given to one who was proved to be a Saint. During The Lost Canvas, Junkers is the Saint who receives the Wolf Bronze Cloth. It is not revealed where he got his cloth, having had it since the beginning of the series.
While the Wolf Bronze Cloth wasn’t seen often in the original Saint Seiya series, Junkers proves himself important in the restoration and re-awakening of an ancient ship, which the Saints wish to use to go to The Lost Canvas, dying in the process. It is unknown what happens to the cloth between the series’ latest chapter and the beginning of the original series, after Junkers’eventual death.