4-WAL is an invention created by Nada, which enables him to have a view the comic as if he was a reader himself, therefore passing through the "Fourth Wall".
Using this giant screen, Nada views the characters and their actions throughout the series. While using this, he realized he wasn't a character in the series causing him to become evil.
- The invention's name is based off the common term "breaking the fourth wall", in which a character makes it obvious that they know they are in a movie/show/play etc. This term was first used when an actor would break character during a play, and talk to the audience past all of the four walls separating the stage from the crowd.