Ok but i just noticed Saihara is singled out in Ouma's board , what does the text near his image says? (It would be hilarious if it had some hearts lol)
I’ve actually been trying to figure that out myself! Sadly, without much progress. It’s impossible for me to clear the text up all the way up until there’s an even clearer image, I think (maybe from someone recording off of the PS4 instead of taking a picture of the Vita screen or television).
Either way, it’s undeniable that Saihara is singled out on the board, and none of the characters seem to resemble either kanji or hiragana that would spell out words like “mastermind” or “ringleader,” so he definitely seems to have mostly discounted the idea that Saihara could be behind it all.
My best guess is that he probably wrote something like “possible ally?” (it does look as though the word ends on a question mark). Given how much he’s checked and double-checked that the game does, definitely end if it comes down to only two people, and how he posed multiple offers throughout Chapter 4 trying to force Saihara’s hand into ditching Momota and the rest of them but teaming up with him, it would make sense.
I think despite his cynicsm and inability to really, fully trust, Ouma thought that if he could pick any ally he wanted from the remaining members, Saihara was clearly the best pick. In addition to being a detective and a huge asset to the group, and “useful” as Ouma has emphasized so many times, he was also someone Ouma found incredibly interesting and fun to be around.
Of course, he kind of ruined his chances there because he and Momota both were practically trying to pull Saihara in half for all of Chapter 4′s trial, and it turns out Ouma doesn’t know how to say “be my friend” or “work together with me” any better than he knows how to flirt.
This is basically what I’ve been speculating on the matter. I’d love to see a higher quality image of the whiteboard if one ever comes out, so if anyone can find one with the Japanese by Saihara’s picture in good quality, please let me know!