Thread:Joe Devaney/@comment-3242266-20160511145208/@comment-26204029-20160511160834

Because that's complete nonsense. Mana was infected with the virus, but she gained control of it and started to use it for her own selfish desires. Here's the TV Tropes descitption of her:

Mana Ouma is what happens when one combines all the worst aspects of a Yandere and an Omnicidal Maniac. She was first shown to be sweet, caring, and gentle, but is revealed to be much more disturbing. When she was five, she was infected by the Apocalypse Virus, but managed to gain control of it. When her brother, Shu was born three years later, she developed a twisted obsession of him, claiming he was the "Adam" to her "Eve" of a new race. Many years later, when Mana found out that a boy she and Shu rescued developed romantic feelings for her, she tricks him into killing himself, before wearing that boy's blood as lipstick and confronting Shu, telling him that it was time to "mate." When Shu rejects her, she snaps and unleashes her virus throughout the country of Japan, killing millions of people before crystallizing herself. When she was reincarnated many years later, she tries to "mate" with Shu once more, even attempting to rape him. When Shu finally stands up to her, she decides to spread the virus throughout the world destroying it, killing billions (if not more). While she claims to have fallen in love with Shu, her "love" for Shu seems to just be a possessive desire, claiming he was already hers before he was even born, supporting her twisted ideology of ruling over a new race. In the end, she was just an extremely depraved individual, who was willing to destroy the world just because a guy rejected her.