Man I really hate posting twice in a row, but I'm gonna ask a new topic just to see if I can help kick strat this thread(well more so). So this is just off the top of my head but.
If(or when) Red and Blue get together, how will Yellow take it and how will they react to her?
If that makes sense. And try not to bash Yellow. Even if LuckyShipping is my favorite shipping, Yellow is still my favorite character(she's just such an angel, I love that).
Anyway, Yellow obviously likes Red, so she'd be pretty upset about it, but I think she would hide it & try to be happy for them. & if they found out of her being upset, I know they'd try to cheer her up. Maybe encourage her to look for someone new. But that might be a while since heartbreak takes a while to get over. Or, Yellow & Blue might get in a cat-fight. Lol. I can't see that happening but it is funny. ^_^
Actually, exculding the whole 'cat fight', I think you summed up what would happen quite nicely. Yellow would be totally crushed, but, being the saint she is, would do everything she could to hide it. Blue would notice, as she's a perceptive girl, and others like Green probably would, too. I kinda doubt Red would realize Yellow was upset without a little nudging and hints from Blue, because he's just dense like that.
Anyway, Blue would probably take Yellow aside sometime and have some kind of girl-to-girl talk, trying to make her feel better.
Or, Green might be the one to talk things through with her. He'd probably be extra kind and cautious about it (ever notice how he's nicest to Yellow out of everyone?), but he'd get his point across and Yellow would begin to move on (perhaps she'd begin to see him in a different light...).
As long as Red never found out about how badly Yellow took things, I believe the matter could be solved subtley (is that even a word?) and Yellow would eventually be happy for them. But IF Red found out, being the utter nice guy and semi-idiot he is, he'd blow it all out of proportion, probably making a scene and apologizing for hurting her in front of everyone, which, at the time, would probably make her feel worse, but then she'd think about it later on and forgive him... she'd just be embarrassed for a bit.
I think the real question to ask is,
How would Blue and Red deal with getting together in the first place, knowing how Yellow feels about Red?
See, I find it likely that it'd be hard for the two to get together in the first place, as Blue and Red are both nice people who wouldn't want to hurt her like that. I mean, earlier on in the series, Blue might have found it in her to make a move on red, not caring what Yellow felt, but now she's turned into a 'nice girl', and cares too much about her and Yellow's friendship to possibly just 'make a move' on Red, and Red's not the type to do anything, in this sort of predicament. Either way, someone's bound to get hurt, and he doesn't want that. I honestly don't know how'd they get together, with Yellow around. Maybe Blue would subtley hint at her liking Red and flirt with him (never with Yellow around, of course), until Red finally caught on and chose between them. After all, in a case of two girls liking one boy, isn't it the boy who should choose the one he cares for? Red wouldn't like it, having to hurt one of them, but it's really the only way.