Soulmates found one story at a time.

A barren, rocky island off the coast of Port Storm, protected by a series of wards that form a maze to keep it hidden from sight. The Eel Mage has a fortress there, with a prison made of aquariums and terrariums where the mage houses creatures he feeds on for magic. 

Dmitri and Inedel grew up there, and recently Stryx and Ember, with the help of the Siren, freed all the prisoners and left the fortress flooded.