Wallace Cyanide

Wallace "Wally" Cyanide (ウォレス・「ウォーリー」・シアナイド) is the secondary antagonist of Zero. He is an associate of Dr. William Rath, Rake Blood, the father of Parker Cyanide, the chief scientist of the Brotherhood, and the archenemy and former best friend of Dr. Murphy.

A former colleague of Dr. Murphy, creator of Axel and Black, and the mentor of Ben Carone/Zero, he wanted to test on living humans and create an army of robots to rule the world but was stopped by Dr. Murphy.

Opposing of Murphy, Cyanide created robots to defeat Zero but failed and was jailed, but was broken free by Ghost and joined the newly established Brotherhood as one of Brian Death's top members.

Upon being defeated by Sebastian Harper, he was re-incarcerated.