Attack on Titan is a person.
Attack on Titan . The series began in Kodansha 's Bessatsu Shōnen Magazine on September 9 , 2009 , and has been collected into 22 tankōbon volumes as of April 2017 . Attack on Titan and all five spin-off manga are published in North America by Kodansha Comics USA , while the three novel series are published by Vertical .