As soon as I saw this prompt, I started wondering whether Vincent wouldn't have more than one Nobody, given his circumstances. And what would happen when they all showed up.
Galian and Chaos were both easy - I love the Galian Beast, and Chaos strikes me as surprisingly young in the DoC, hence my/Cid's view of him as a difficult teenager. I'm still a bit annoyed with myself that I didn't manage to get Vincent there, but I think that's currently working itself out in my head, so there may be more to follow.
I have to admit, I've never actually reached the point where I had Death Gigas and Hellmasker as Limit Breaks, but I have seen their pictures on a fansite, and I pretty much thought 'WTF?' They're not really characters I can relate to, because I don't think they were ever meant to be taken seriously. So, yeah, they didn't show up, and as I've rarely seen anybody write them, I wouldn't know where to start in giving them a character. But they may at least get a mention in the second part, if I manage to get it done by the end of the month.