Ebola-chan, Lloviu-tan, and Marburg-sama
Ebola-chan, the cute viral goddess herself. Worshiped by misanthropes all around the world, she was the one primarily responsible for humanity's destruction.
Lloviu-tan, the youngest sister. She isn't infectious to humans, and likes to spend her time taking naps and having fun. Recently her health has been declining.
Marburg-sama, the soviet-enhanced biological weapon. Despite her usual cold demeanor, she has a lot of love for her sisters, and will stop at nothing to defend them.