Urin

Though they lack biological ties, Marin views this young sea dweller as her much-beloved little sister. Driven by intense worry over rumors regarding humans, Urin ventures to the surface world alongside Marin to help recover a lost ring. This perilous journey leads to a pivotal moment in her destiny when, through a mix of accident and manipulation, she inadvertently plays a role in releasing one half of the powerful entity known as Sedna.