Nyaruko (ニャル子 Nyaruko?) is the main female protagonist of story, and an alien who is sent by the Space Defence Agency to Earth to protect Mahiro Yasaka. Nyaruko is a race of alien known as a Nyarlathotep which was originally featured in Lovecraft's books as a type of monster. She is sent by an organization called the Space Defence Agency to Earth in order to protect a human named Mahiro Yasaka. Nyaruko quickly falls in love with him though which she refers to as "love at first sight". Her feelings towards Mahiro become serious with her going so far as eventually talking about marriage and a family together. She takes the form of a human girl with long silver-colored hair, but jokingly says to Mahiro that she can change to her original form if he wants her to. In order to blend in she takes