User blog comment:ConspiracyKiller825/The 1st Danganronpa Games/@comment-31779172-20150416211654/@comment-24712732-20150416213908

I don't think it could be Gemma, since she didn't remove her blindfold at any moment. It also cannot be Aemilia, because once I get her backstory up you'll realize that she wouldn't kill an innocent. That leaves Brett, since I doubt that Octavia would've killed that girl (I forgot her name right now.)

Something tells me that Octavia is going to become these Games' Kyoko Kirigiri (a character from Dangan Ronpa), but I'm not really sure. She seems like an interesting character, so it would be sad to learn that she was the culprit, because that would mean she's getting executed after the Tribute Trial. It is more likely that the culprits were Brett and Luna, due to the whole insane stabbing thing.

Verena and Astus are also possibilities, though. I don't know why, but they seem a bit suspicious. Verena strikes me as a background character, like a cardboard standee who has something to hide, while Astus has a weird behaviour in general.