Squid Girl

Squid Girl, known in Japan as 'Shinryaku! Ika Musume' (侵略!イカ娘?, lit. Invade! Squid Girl) with the subtitle The invader comes from the bottom of the sea!, is an anime adapted from the manga of the same name. It follows a squid girl from the ocean has come to the land from the depths of the sea to conquer humanity for its pollution of the ocean. Unfortunately she ruins the first house she uses as an invasion base and has to work to pay for repairs. Of course, she can't overcome the Aizawa sisters who manage the house, so who knows whether she can subjugate humankind.

Aren't You An Alien? (Season 1, Episode 5a)
In an attempt to get Squid Girl to reveal herself to others as an alien, Extraterrestrial research expert Cindy Campbell brainwashes her into revealing it...only for it to backfire.

Squidn't That Hypnosis? (Season 2, Episode 11a)
As Sanae practises hypnotism in the hopes of hypnotizing Squid Girl, the others play along with her. Although Sanae fails to make it work, Squid Girl is actually able to make it work, only to discover the coin she had been using was actually a device made by the Three Stooges.