Anti-Bio Particles (反バイオ粒子 Han Baio Ryūshi) are special particles devised by the Anti-Bio Union during their civil war with those who had invented and were supported by Bio Particles on the planet Bio 500 years in the past. Fearful of the weaponization of Bio Particles, the effects of which were unknown to the people of the planet at the time, these antithesis particles were devised and used by the opposing faction in the Bio War. Their most notable and infamous usage were for the development of a special warrior machine used by the Anti-Bio Union to crush their opponents: the assassin known as Bio Hunter Silva. The clash of Bio Particles and Anti-Bio Particles were enough to weaken the planet, with the Anti-Bio Particles in particular weakening to the planet; despite both sides becoming d