One of the more famous businesses of Amaranthum, the Adventurers' Guild is a mercenary guild providing problem-solving services around the world. The Adventurers' Guild was created as a means of not only providing adventuring services, but also serving as a centralized organization providing supplies and resources to adventurers, as well as governmental oversight. Anyone wishing to engage in adventuring in Amaranthum or its allied countries must register with the Adventurers' Guild.

The Adventurer's Guild was founded during the Silver Age of Amaranthum as an arm of the Amaranthine Navy. It soon became an semi-independent organization, still answerable to the Amaranthine Government, but allowed to keep profits for its own use - usually distributed to Adventurers in the form of food, housing, training, and equipment.

The grand opera house of Amaranthum, the Imperial Opera, is the premier venue for arts and culture in Amaranthum. The renowned maestro Professor Alphonse conducts weekly music concerts for Amaranthum's High Society. The high-arched roof made from glass and wrought brass are not only exceptionally beautiful, but provide a unique acoustic experience.

The most popular brothel in Amaranthum is the Mercenaries' Guild. This is in contrast to its original purpose, which was, during the Imperial Age of Amaranthum, a privatized military, offering military services to the Amaranthine Navy. During the time wen it provided military services, it competed with the Navy for recruits. As an incentive over the Navy, it offered in-house prostitution services. Eventually, the prostitutes of this guild bargained for greater and greater rights - better pay, better healthcare, better legal protection, that they took over the guild, shifting the guild's mission. In Amaranthum today, prostitutes, even those not affiliated with the Mercenaries' Guild, are known as 'Mercs' - a humorous double-entendre referring to the nickname for mercenaries, as well as the name of a pubic wig, a 'merkin'.

The shipping guild serves as the primary delivery and logistics company for the city and country of Amaranthum. Due to this broad purpose, they also provide banking and lending services. While public mail is often finally delivered by unaffiliated individuals (often members of the Adventurers' Guild), most mail does pass through a Shipping Guild office.

There are three major Noble Houses in Amaranthum: Tetrus, Dauphin, and Marrowless. These three houses constitute the major powers in Amaranthine politics. Each house is formed around a noble family, from which it gets its name, but can consist of many families of noble (and royal) lineages. As a rule of thumb, an Emperor is elected from one of the Major Noble houses.

• The Tetrus noble house is named after the Tetrus family. It is led by Armand Tetrus and his two children, Amanda his firstborn, and Alexander. The racial makeup of Tetrus House is primarily human. They are considered the wealthiest noble house in Amaranthum, and often complete with the Dauphin house for the Imperial Throne.
• The Dauphin noble house is named after the Dauphin family. It is led by Jamie Dauphin, the current Emperor of Amaranthum. His mother Selene is technically ranked lower in Dauphin House hierarchy, but she is often at her son's side, giving advice. The racial makeup of Dauphin House is plurality Human, with elves and halflings.
• The Marrowless house is ruled by a council instead of the head of a family. The chairperson of the council is the Minotaur Brutus The Golden. The other council members are: Professor Alphonse (of the Grand Opera), Morothyr the Scarred, Gshakt, Hecate Frostborn, the Paladin Hope, and Mustard Seed. Marrowless is a house made of many families of many different races - gnomes, tieflings, therianthropes, faeries, and more. There are humans in the Marrowless house, but they are a small minority. Due to the extensive non-human racial makeup of Marrowless, it is perjoratively nicknamed 'Monster House'.

There are dozens of minor Noble Houses in Amaranthum. Below is a brief overview of the most notable:

• Underhill Clan: Made up primarily of dwarves, with a small number of gnomes and halflings.
• Druid Conclave: Technically not a house of nobles, but does have the legal status of a noble house. The Druid Conclave is a loosely affiliated group of Druids and Rangers who protect untamed wilderness.