Ika Musume

Ika Musume is a squid girl who calls herself a “Messenger of the Sea.” Angered by humanity's pollution of the ocean, she comes ashore intending to conquer the world, only to discover how unprepared and alone she is. After damaging a beach house during her invasion, she is made to work there and gradually learns about human life. She can produce ink and use her blue hair as tentacles.