Haggard uses Orientalist language to describe Kari--in his robe, he "looked like an Eastern prince disguised. . ."

This description would help make the natives of Peru more familiar to British readers as would Deleroy's remark when he calls Kari "moor man" (103)

Kari speaks in broken English, while Hubert's Quechua seems practiced.
Kari is protective of Hubert and a jealous type

Hubert is a trader and merchant; his goods will be sent to the Mediterranean.
He is also a prototype for the British imperialist of later centuries.
He owns land but is still not royalty.  He has to make a name for himself to be worthy of Blanche.

Blanche's name is a false signifier.