Toshio Shimura

Professor Toshio Shimura was a scientist who worked at the Roarke 279 Research Facility on the planet Bliss.

Biography
Toshio began experimenting with Piranha Locusts, crossing their genetic structure with that of silkworms to give them the ability to consume metal, and managed to turn them into a more hostile species. He dubbed his creations the Kiseibya, supposedly translated as Parasite Saviour. Shimura had intended to keep the Kiseibya contained until he could breed them to a point where they would be unable to consume human flesh, but the arrival of a Dalek attack force in the system apparently forced him to release the Kiseibya early so that they could feed and breed in his fellow scientists, reasoning that the scientists would die anyway when the Daleks arrived and their deaths would accomplish something this way.

Although the Kiseibya proved effective against the Daleks (although vulnerable to most weapons, the speed of the Kisaabya’s gestation and reproduction, coupled with their ferocity in attack, helped to counter that weakness), the Doctor was obviously unnerved by the similarities between Shimura and Davros’s research, both having created a new race to "save" their own from a prolonged war, as well as both being unprepared for their creations’ unwillingness to obey them. Shimura protested that his creations would stop the Daleks and save mankind, but the fact that the name "Kiseibya" means "parasitic saviour" suggested to the Doctor that Shimura knew what he was doing was ethically conflicted from the beginning.

He sacrificed himself to the original Kiseibya so he could live on through their children as he recognised his inability to control them. (BFA: Enemy of the Daleks)