A ganzu, or revenge society, was a group of Orions that committed acts of vengeance for pay. A person who lacked the means to exact revenge on those who had wronged them could hire a ganzu to carry out a suitable act of retribution on their behalf. For example, the offense could be a bad business deal or a stolen girlfriend, or it could be some more serious crime with no proof to convict a known perpetrator, or the law otherwise protected them. The revenge could be as simple as a sabotaged grav car to something as involved as looting a warehouse that the victim owned. The cost was usually high, but the results were often worth the price.