Thread:BowserRulesAll/@comment-27033016-20190622145050/@comment-27033016-20190628130759

Right. This one I didn't catch until very recently when a friend on TV Tropes told me about the simularties between these two. Both Shiori and Mana are victims of apocalyptic events that changed their lives drastically, and as such, have became harbringers of the apocalypse (Mana contracted the Apocalypse Virus after coming into contact with an alien meteorite that caused Lost Christmas, while Shiori perished in the Tokyo Twilight Disaster and was revived by the strongest Greed, the Twilight Apostle, to become its vessel). They are capable of carrying disaster on a worldwide scale and their actions are purely motivated for their affections towards the main characters Kou and Shu respectively. Furthermore, despite the protagonists' best efforts to save them, they had no choice but to put Shiori and Mana down to end the apocalypse.

So yeah... Heavy spoilers.