The Caldaru people are an Arcadian ethnic group who make up a minority population in Xopatl. An immigrant Caldaru population can be found in the city of Senghor in the Mwangi Expanse; many years after making their home in the Mwangi Expanse, they only recall that their ancestors came from a distant land and have lost contact with Arcadia but retain their unique culture and language, distinctive from those of the Mwangi peoples who make up a majority of the Expanse's population.
In appearance, they are tall, with dark tan or olive skin, straight dark hair, and green or blue eyes. This makes them somewhat similar in appearance to the Lirgeni who once lived in the northern part of what is now the Sodden Lands.
They are renowned sailors and diplomats, making Senghor a popular place for trade, and skilled engineers who have built the city to withstand powerful storms. The city's Caldaru-dominated navy also expertly defends the city from pirates. This combination of traits lends credence to theories that the Caldaru originated from a lost seafaring power.