Left to right, top to bottom:
>Ika Musume, Swimsuit version:
I don't see why they didn't just make Ika a cast-off, seeing as her swimsuit was practically the only thing she ever wore aside from her dress with any frequency in the anime and they've done cast-off Figmas before.
>Eiko Aizawa:
Really, they needed to make at least the Aizawa sisters for Ika to torment/be tormented by. I wonder if Ika sold poorly or if they just couldn't be bothered?
>Chizuru Aizawa:
See above.
>Space Marine:
Never gonna happen because GW are arseholes. Oh well, we can dream. Not sure whether a Figuarts or a Revoltech Sci-Fi would be better. Figuarts would probably look better and be a good scale but Revoltech would be cheaper and allow for parts-swapping mayhem.
>Genestealer:
See above.
>Chaos Space Marine:
See above.
>Scanty and Kneesocks (Normal):
These 2 really need some proper merchandise. I'd probably prefer the Nendoroids as I haven't heard many good things about the PSG Rio:BONEs.
>Scanty and Kneesocks (Transformation versions):
Do I need to explain this one?
>Panty and Stocking (Transformation versions):
Companion pieces for Scanty and Kneesocks Figmas.
>Filia:
Really the whole cast of Skullgirls needs figures, but Filia is my favourite so I put her on here.
>Mako Mankanshoku:
Yes, I know, le shit taste KLK maymay. I dunno, it doesn't feel right having a Mako Nendoroid but no Figma. Though given Mako's reality warping powers I suppose you could put the Nendoroid alongside Figma Satsuki and Ryuuko and it'd be screen accurate.
>Hitomi Tanaka:
Hey, if Billy Herrington can get a Figma then so can IRL Mega Milk.