Originally bound to the rivers and lakes of Eastern Europe, this particular Rusalka transcended its territorial constraints during a rare celestial alignment that merged multiple cryptid domains. The cosmic event granted it the ability to manifest in any body of water worldwide, allowing it to serve as a universal observer and keeper of cryptid knowledge across all aquatic and terrestrial boundaries.

Possesses the ability to phase between liquid and solid forms, allowing it to traverse any water source globally while maintaining a corporeal form on land. Can communicate telepathically with all water-dwelling cryptids and shares a deep empathic connection with land-based entities. Its presence causes subtle disturbances in nearby water sources, creating a ripple effect that other cryptids can sense and interpret.

Serves as the primary intermediary between aquatic and terrestrial cryptid species, maintaining the delicate balance between water-dwelling entities like the Kraken and land-based creatures like Sasquatch. Collects and preserves the oral histories of cryptid encounters through its unique ability to absorb and retain memories from water sources worldwide.