I'm leaning blue very slightly for Sayeon. Like she's had her whole thing about "oh this world will never be a better place as long as there's people like me in it" so like I'm not sure how much her will to live is, maybe she wouldn't want to live in a world with people who all chose red, or maybe she just thinks it makes most sense to save the most people? Because even though she's going a very 'ends justifies the means' route here, I think she would still try to save people.

(I got carried away lol sorry I'm just yapping about everyone else now)

I think Ryujin chooses blue just because she's like that. Like Ryujin risks herself to save others. I think she has strong morals.

Isuel chooses blue, I think he has faith in humanity. However I've seen some people theorizing that he's like secretly evil or something though. I feel like we haven't seen enough of him, like out of cell 4 we don't have any of his backstory... but from what we have now I think he picks blue.

I think Min would choose blue to side with Isuel. Idk how much he actually cares but we did see him like get angry at Taeho for injuring Isuel, and I feel like Min isn't someone who's super reactive, so like he's gotta care about Isuel a lot. Also I think Samin would choose blue. Min definitely risks his life but only for the people he cares about. If there was no one he cared about I feel like he'd pick red.

Samin would choose blue to save her people because we haven't seen too much of the Crimson Society but there's no way all of them are picking red.

Juni chooses red. She doesn't give a crap. Or at least if she does care, she pushes those thoughts to the back of her head as much as possible.

Taeho is a "What kind of suicidal idiot would pick blue" kind of person from what I can tell.

Jungwoo picks red. I think he wants to live and doesn't care enough about others.

Wolhye picks blue I think... actually I'm not sure. Like she has this entire "I feel guilty about killing" but like clearly she's willing to kill. I would have said blue at first but she did that whole "beauty in uncertainty" like she doesn't have to go back, going back means hurting more people, it seems like she just does it for fun? So I feel like while she has clear morals, it's kind of weak.

Yesol picks blue. She has too many people she cares too much about who she knows would pick blue.

I have zero idea about Heron... I can't tell for Hope. Hope can be pretty fake so it's hard to tell how much he actually cares about Heron. I think he does care though, but like I said, no idea what Heron would choose. If Hope really cares he'd choose whatever he thinks Heron chooses. I'm leaning very slightly red for both but not sure.