Unexpectedly, the Hissi got tyhe Royal treatment. Both of them have very nice accessories. The Royalboy has a large crown, cape, and armor that could probably go well on any other Hissi base colour. Speaking of which, the Royalboy's base colour looks very similar to basic Blue, but they do try to make up for it by giving him bushy eyebrows (which look a bit silly) and 'whiskers' (which work out well enough, I suppose).

The Royalgirl has an interesting base colour. It looks like purple but in reality is indigo. If you want to see how I know it's indigo and not purple, try looking at your monitor from a different angle and she'll seem to turn blue. Monitors do not like indigo and will make it look either purple or blue.
Her accessories are very nice, though they do make me think of a harem dancer. The European-stlye crown on her head is a bit off-putting (the same applies to Royalboy), but it's pretty and would likely be nice for any other base Hissi that could wear it.

If there are two bones of contention here they would be that the Hissi are not in some MesoAmerican royal garb (as one might expect) and that their wing-hands are empty of sceptars that could easily have been placed there.

Other thoughts may be expressed here.