A governor (from French gouverneur) is a governing official, usually the executive (at least nominally, to different degrees also politically and administratively) of a non-sovereign level of government, ranking under the head of state. In federations, a governor may be the title of each appointed or elected politician who governs a constituent state.
In Prasia, the term refers to an elected executive of one of the six regions of Prasia. Whilst the role of Governor varies from region to region according to that region's particular laws, in most cases the Governor acts as the head of that region's executive, with the region's legislative power falling to a seperately elected council.
One exception to this is San Serena, which due to the fact that it is both a city and a region, has no Governor, but rather a directly elected Mayor, performing similar duties to a Governor.