I do recommend you avoid the 999 character pages for spoilers. The game page is currently safe though. Seemed to be the best way to go about things, though I tried to prod the other editors for help. Spoiler blocks in the new wiki design would be welcome.
The 999 characters relevant to this list are: Zero, Santa, Seven. Their names are actually numbers, and not metaphorically based on numbered things. (June doesn't mean 6, for example.)
If you add Ace and Snake, I'll be forced to stage a Snake Eyes filibuster. ()