It's just a quick drawing. It took only 2 minutes to made it... in my head.
I'm not so familiar with drawing horses, it is know. Damn you dothrakis, why don't you just travel on foot?
Anyway, that dothraki guy is supposed to be Aggo, but since I couldn't find a description about him, just draw him randomly. The others in this picture beside Dany are just random Qarth people.
Characters belongs to George R.R. Martin