The Rotter is a unknown, yet gasous entity, that was once an enemy to Brensle, since it's gasous it has the ability to enter anything, it even used this to take control of Brensle when they were enemies, but it's too bad only Brensle, Coder Brendan, Rotter and Sylvaphy remember this, unless... you count Realism Brendan, which I am not for this.