Itall "Baron Muster" Sonan

About

Baron Muster (バロン・ムスター), real name Itall Sonann (イタル・ソナン), is a mysterious man and self-proclaimed villain. Once a kind-hearted young man, he was driven mad by events which caused him to contract the Maske Tumor disease and his loved ones to die miserably. He is the bitter enemy of Cydonian Queen Kagura Dornburg, whose betrayal and cruelty destroyed his sanity, and has spent ten years plotting and executing an elaborate plan of revenge. He uses a poison called the Krista Morten to kill his enemies, and desires nothing more than finding the Secret Treasure of Mars.

(Source: Battle Angel Alita Wiki)