It's always difficult finding anything interesting to say about a colourfill like the Orange Ruki. It does what would be expected without being blinding or similarly off-putting (unless you simply don't like the colour orange). There are darker orange places that work pretty well, but that's about it. It's a nice coloufill, but it's a colourfill nonetheless.

Zombie is a more interesting colour. It has the usual cadaverous grey colouration with slightly darker parts where Ruki normally are darker anyway. You can even see a bit of veining on the back wings in the full version. The shirt and shoe are okay, but they somehow don't quite scream 'undead' to me; I much prefered the Neovian style of dress since it could show moldiness and tattering well. The eyes are very nice and creepy. If there are problems they lay in the fact that the mouth looks like it's smiling (and I'm not sure that was the intended effect) and there's only one shoe, which looks a bit odd.

Other thoughts and comments can be made here.