Letters / Vanishing

is a Japanese light novel series written by Asahi Minoo, with illustrations by Oguchi. The series began publication on September 10, 2014 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
All the events of this world are described by the letters "world language" written in one system. Pengju, a subject who has the ability to directly distort the shape of the body by manipulating the "characters" that make up humans.

The moment the metagram that seals the visualization of "characters" was lifted, she transformed into an innocent and cruel murderer. Pengju murders Professor Amano, a leading expert in world language research, and escapes from the camp according to the instructions of the "legal officer."

A boy named Torafu who was entrusted with "characters of silence" by his grandfather, a woman named Nanoka who was forgotten by God in the language, and a heretical language user, Pengju. Their destiny is mixed, and the world is eventually rewritten.