Headscratchers / Mulan: Rise of a Warrior

• Who exactly is the Caucasian-looking man (Played by Vitas) who is serving the Rouran chieftain and how did he get there?
  • Some random Caucasian minority tribal living in the "barbarian" lands (there's quite a few of those tribes along the Silk Road, it turns out), and he got there by being competent at his job.