Doctor Gibahttp://i231.photobucket.com/albums/ee121/Kainsword17/B... A brown-haired, bearded human-looking leader and founder of Bioron. His real identity is Gibanoid, a bio-monster born by accident from the chemical waste of Doctor Igarashi's National Science Academy Bio Laboratory. As a result, Giba is filled with malice for humans. He assumed his true form in the series finale, using Mayumi as a shield to escape in his ship. He died while fighting Jiban on his ship as it crashed into the mountainside.
Bionoids Monsters of the week, the product of Doctor Giba's research. They can disguise themselves as humans.
Influenzanoid (Kazenoid)http://i231.photobucket.com/albums/ee121/Kainsword17/B... The only Bioron with a heart. Originally a simple doll transformed into a carrier of a flu-like disease engineered by Bioron, he is nevertheless unable to hurt his previous owner (as a doll), a little girl.
Suitorunoidhttp://i231.photobucket.com/albums/ee121/Kainsword17/B... Was sent to suck out the mind of a brilliant scientist to make a cure for the Pollen a Space Butterfly was scattering about that put people (Even Marsha and Karsha) to sleep. Created by Queen Cosmos she attempted to get to the Scientist first but Suitorunoid absorbed not only the Scientist's mind but that of a young boy. When Queen Cosmos used her Mind-Snake on the Bionoid to release the minds the 2 got switched into the wrong body.