If I had the time to make this thread (which I didn't, lol) I was going to suggest tying all remaining Royal pets in design with Monarchs of the regions from which the animals the pets were based on came from.
The Bori, being based on an Armadillo would be located in southern US and a lot of South America. Notably the entirety of Brazil. I thought perhaps a colour based on Brazilian Emperors of old.
Emperor Pedro II of Brazil
Maria I
Jetsam, being a fish, doesn't exactly belong to any one place, but the Island idea is likable. Namely the Kingdom of Hawaii.
King Kalākaua
Queen Liliuokalani
Lutari, based on Otters range from a wide number of places, including most of Europe and Canada... I'll focus on Canadian Monarchs here. Well... seems there are a lot of loan kings from France and England here, so I'll focus on France. shows how much I know about Canada, it seems.
King Louis XV
Marie Leszczyńska
(these were the last french king/queen of Canada
Meerca, being based on Chipmunks, bring to mind ideas of North America. I suppose for differentiation, because not many Kings are in the US (lol) I'll look else where. The native americans! Chiefdom of which is the closest thing to a king in this culture, so seeing something along these lines could prove interesting.
People of the forest dwelling Chippewa Tribe.
Ogrin, being based on the Okapi come from the Ituri Rainforests in the Democratic Republic of the Congo.... unfortuately, I can't find any pics of leaders of that area for the time being. lol... other than this one of President Mobutu
The Ruki, being a mantis, comes from a lot of places, and I was unsure which to cover, til I found out that some Africian indigenous cultures view the mantis as a GOD... unfortunately, there are not depictions of this Mantis god that I could find. Turns out a german author coined the name Mantis (I think) so I went with German Empire.
Charles the Fat (great title)
Maria Theresa
Tonu is pretty clearly a Rhino. So africa it is. The Zulu seem interesting enough.
King Shaka kaSenzangakhona
and uh... couldn't find a pic of the only female king. Mkabayi kaJama... (: they could be cliche about it I suppose.
and lastly the chia...
Chia, being more of a fruit, doesn't exactly have an area to call home. Unless you count the banana republic.