nenaiko dare da

ねないこだれだ (Nenai ko Dare da - Who is the child not going to sleep?) is a picture book written by Sena Keiko.
It is also a name of a ghost written on the cover of the book.
In the story, the ghost kidnaps the child who is not going to sleep.
Later, the ghost became a popular meme character in futaba channel.

See Also

• Wikipedia article (JP): ねないこだれだ
• Futaba gallery: http://sonimf.s27.xrea.com/
• Know Your Meme: Don't Want to Go to Bed?