An environment where survival is paramount, like the Underworld, definitely needs fighters. Hence, the Bravos: those that serve as hired muscle, bodyguards, assassins, gladiators, or anything else where the ability to deliver physical injury to another living being is a marketable skill. The Bravos are one of the most powerful Guilds in the Underworld. All of the warriors who owe allegiance to one of the Domains are members of this guild (armed conflict between domains is greatly helped by the fact that there is not proscription barring fighting against fellow Guild members…it is expected, in fact). Freelance fighters are also members…or, rather, they’re supposed to be.
The Bravos are the only people in the Underworld with a legal right to perform violence. Any violence done within the Underworld by someone who is not a recognized member of the Bravos Guild will not only brand the perpetrator as an outlaw but will draw the wrath of the Guild itself. Just try to exist in the Underworld with every Bravo out for your head. The legal right means that a Bravo could kill someone in a public bazaar, and, when the guards arrive, simply hand over his contract to prove it was sanctioned. Many times when a fight occurs without a contract – a common enough occurrence – the Bravo will simply hand over his Guild identification. The guards, Bravos themselves, usually let it slide.