Soleanna

Soleanna, also known as the City of Water, is a beautiful coastal city-state, kingdom and country within Sonic's world, and the main setting of Sonic the Hedgehog (2006).

The city is a constitutional monarchy, with an economy dominated by tourism and precision machinery[1]. Politically, it does not appear to be part of the United Federation, or under the protection of the Guardian Units of Nations[2].

Reigning male monarchs apparently eschew the title "King"[3], and Soleanna's sovereign is generally known as 'Duke' if male or either 'Queen' or 'Princess' if female. The small nation is apparently wealthy and prosperous; with its urban environments bearing resemblance to modern Mediterranean cities. However, Soleanna is shown to possess highly advanced technology 'behind the scenes', as is evident in the Aquatic Base level, a research lab underneath the ancient Royal Palace (located in Kingdom Valley).

The city worships a deity known as Solaris, "The Eternal Sun God", who is honored during the Festival of the Sun. Soleanna's sovereign during the events of Sonic '06 is the young Princess Elise, introduced while presiding over this ceremony. In the game's timeline, the ancient castle that used to house the royal family in Kingdom Valley is revealed to have been abandoned after the Solaris Project accident. The new castle is on an island off of Castle Town near New City – although it is unclear if this remains true in the new timeline after the game.