There is no point of having a character basically fallen out of a land that no one ever heard off! Think about where you want to possiton your country in relation to the existing lands since there is just no place to add such a large landmass! Look at Metronome's nation, he already decided it would be a southern island country in a fairy isolated part of the world so I suggested south-east from Loraya which is one of the most isolated areas.

By what I read about your country the possition fitting it would be the northern Everan where such country could exist without much fear from the Geworians. They could be replacing our world's Vikings (altrough their expansion fueled by religon rather then need for land) and would be what is stopping Geworia from expanding northwards.