Randolph Bane
Randolph Bane was the owner of the "Bane Incorporation" and one of the few people with the ability to manipulate the Doctor's amaranth. In life, Bane was extremely agoraphobic and actively sought out to become immortal.
Due to his immense agoraphobia, Bane lived within a hermetically-sealed bunker on Earth and only interacted with robotic life. While for many years, the amaranth (which took the form of a clockwork egg) was held within the Grey Museum of the Shadow Directory, Bane managed to steal it from the Museum during the twenty-sixth century. After hooking a being known as "Employee One" to it, Bane set about using the amaranth to bring about his own immortality in an event known as the Conversion. This also began creating various somewhat ephemeral alternate timelines which sat within the "main" timeline. (PROSE: Oblivion)