WARNING: SPOILERS FOR EMBER RISING ARE AHEAD; CAUTION IS ADVISED.
Citadel lord is a title given to the leaders of the various secret citadels of Natalia. However, at least in the case of Cloud Mountain, the lord's authority is beneath that of the community council. The title is apparently hereditary, with the position falling to the lord's biological heir where possible. The spouse of a lord - if they have one - is honored with the title of "Lady".