Ika Musume

Ika Musume (イカ娘, lit. Squid Girl) is the main protagonist of Shinryaku! Ika Musume. She is a squid-human hybrid who comes from the sea with plans to invade humanity as punishment for them polluting the sea. However, after causing damage to a beach house, she is forced to work as a waitress to pay for the damages. She later begins living at the residence of the owners of said beach house.