Miromara is said to encompass the Mediterranean Sea, the Adriatic, Aegean, Baltic, Black, Ionian, Ligurian, and Tyrrhenean Seas, the Straits of Gibraltar, the Dardanelles, and the Bosphorus.
Miromara was the first of the six Mer realms, founded by the great mage Merrow. Once Merrow nad founded Miromara, she went off to expand the Mer world. There ended up being six Mer realms, who mostly got along very well. However, Miromara and Ondalina did fight in a war, which Miromara won. Ondalina struggled under the agreement the two countries came to. And about a hundred years later, they broke this permutavi.
Near the beginning of Deep Blue, Miromara's capital, Cerulean, was attacked right in the middle of Serafina's Dokimi ceremony. The palace in the center of the city was destroyed and taken over by Traho's troops.
Miromara has a very strong military force. As a first wall of protection, a forest of thistles called the Devil's Tail floats above the city. There are many soldiers, commanded by Vallerio. And the final group is called the Janiçari, the regina's personal guard.