Trazior means "Three Sisters" in the local Necromundian dialect. It is so called that because of its has three huge spires which can be seen from a long ways off by and travelers coming across the wastes from the south. Trazior is located on the edge of the Great Equatorial Waste and is the southernmost "frontier" hive of the great Palatine Cluster.

Many important merchant clans (houses) are based in this hive and it is the main trading depot for convoys going to or arriving from the southern hive clusters. The nomads who live out in the wastes and raid the convoys are a constant source of annoyance to its inhabitants.

Trazior was also the scene of one of the most prolonged and vicious gang wars in the recent history of Necromunda.