Planchette

Planchette (プランシェット) refers to a type of automatic writing. It is most likely a flat piece of wood that is used to spell out messages or have pencil attached to it for writing, though this is just a speculation. It is unknown on how the Planchette is used in the Toaru Majutsu no Index.

Angel Fall Arc

 * ''Main article:Angel Fall Arc

Tsuchimikado Motoharu references it along with Kokkuri to describe on how Hino Jinsaku takes commands from the writings of his right hand.

Trivia

 * It apparently has no relation to Index's John's Pen Mode, as the kanji used for it can be translated as Automatic Writing.