Bulletprof was the most aggressive of his siblings, and he never believed in the attempts of creating peace between the de Megazones and VanWhams. When it all left to the death of his oldest sister, Sweetheart, he, Morapüük and Gunstar organized 2 revenge-trips angainst the VanWhams. Bulletprof was injured in those attacks but he survived, just to face a new threat. The baby of deceased Sweetheart, now named to be Ironheart after her mother and the coldness how the family felt for the newborn mouse child, had been announced to be the official crown inheriter, which got Bulletprof`s blood boil. By the open coffin of his oldest sister he swore to fight against the thief of the crown and return it to Gunstar, who was second in the crown inheritance order after Sweetheart. Bulletprof himself was 4th in the order, and he was very sure he`d never have the chances for the leadership. Therefore he had chosen to support the true FULL de Megazone inheriter and fight for her.
In the beginning Bulletprof`s work against the baby was less significant and done in secret but it became more direct and violent by the time the baby got older and refused to die, even if no-one ever confessed to even feed her. Finally after 3 years of hidden attemps to murder Ironheart, Bulletprof loaded his favorite gun and got dressed up in his chest-belt full of poisoned battle knifes. A scratch of his knife meant for its victim the sure death and his gun had never failed him. He stepped into the gloomy dungeon cell where Ironheart was kept away from learning the secrets of Technodrome. Victoriously Bulletprof, lifted his gun and targeted it between the eyes of Ironheart, who didn`t show any sign of fear. She grinned wickedly to her uncle Bulletprof when he pulled the trigger and launched the deadly laser and 2 bullets at the same time towards his niece. The gun exploded from the back of it and hit Bulletprof to upper chest on the right side. Wounded Bulletprof collapsed on the dungeon floor and from the force of Ironheart, the knifes of Bulletprof thrust into him, cutting deep wounds, pumping all his blood on the floor and his insides.

Bulletprof became the first victim of his Ironheart, but he wasn`the last one of the family who tried to murder the first of the two most cruel de Megazone leaders.