Izzy was the bomb; he and Sora were probably the two I felt really bad for. Both of them, especially Izzy, did a lot for the group in their own way. I honestly didn't care for Joe that much, but I do wish they did a little more with his character (mostly because I don't remember much about his good moments).
Applying that to the RP, though, if Kaiba gets out of line (or a different character; I just mention Kaiba because he looks like the obvious target that it'll have to happen to... sorry if I offend :x) Dontae might just speak up and tribute to Izzy... assuming there's something for him to feel confident about. Right now the track record has to improve a little :b