A medium shot from a side-angle depicting a Scylla-inspired monster girl, a siren of the deep, emerging from a shimmering ocean surface. The character is a hybrid female entity with a human upper body and a monstrous lower half consisting of several undulating, scaled tentacles in deep turquoise and purple, gripping the jagged coastal rocks. She has long, flowing hair that mimics the movement of seaweed, translucent fins protruding from her forearms and calves, and iridescent scales dusting her cheeks and shoulders. Her expression is predatory yet alluring, with glowing bioluminescent eyes and a subtle, mysterious smile; her webbed fingers lightly brush against her collarbone. The background features a crashing shoreline with white sea foam, dark basalt cliffs, and a misty, moonlit horizon under a starry night sky. The atmosphere is ethereal and mysterious, with a cool color palette of deep blues, teals, and silver highlights, enhanced by glowing aquatic particles and a soft depth of field focusing on the character.