He’s even less defined here than in the show. He’s powerful, he’s barbaric, and he has affection for Dany. He’s learning the Common Tongue. In a way he’s like Baratheon: we’re all waiting for him to die so that the true leader can come forth. He doesn’t seem vulnerable as Robert does, but he also has less character development. You don’t give so little time to someone who has meaning to the story.
However, we explicitly get the detail multiple times that his long hair has never been cut because he has never known defeat in battle. A naturally gifted warrior is probably an Eight or Nine.
Drogo also gives the speech about conquering the Iron Throne after the poison attempt on Dany. The written words have none of the energy Momoa brings, with his fusion of character and Maori Haka. It’s one of the few times the show is better than the book.
Unlike the TV series, where Drogo is wounded in an argument, here he is cut in battle. He has sent the healers to help the other injured men, as a good leader would. Dany intervenes when she sees his pain and calls the healers back. Instead, though, Mirri the Maegi offers her services. Whatever is in her poultice, he rips it off after six days. It itched and burned. Is that good? Now he has a soothing mud plaster and poppy wine that he drinks heavily. Flies are following him.
After he falls from his horse, Mirri is called. It seems that the poultice was true. Why would someone so very strong, someone who must have been injured before, shy from healing? Ah, because it was delivered by someone he didn’t trust. Eight. His paranoia and aversion to mysterious healing is the tell. Eights, the strongest of the strong, are vulnerable when it comes to understanding sickness.