So I have a theory based on today's episode. Let me know what you think:
I think The Dragon is Mulan's father. The fact that he is still not even given a name, despite an interesting line from Emma (It would be easier to find him if we knew his name), makes me think the name would give away who he is. Mulan's father would have a name, and we would recognize it. Also, The Dragon is also an older man, which fits with the Mulan story (her father was too old to fight in the war), and the part about losing his daughter could be tied into Mulan's status of being a lesbian on the show. It would be interesting to see Mulan try to tell her father about her sexuality, and him rejecting her for it. Also, it would allow both The Dragon and Mulan to get a backstory episode, because one episode would be both their backstories. Another interesting thing is Mulan and The Dragon were both introduced in Season 2. Many of you will probably say this would be a big departure from the Disney movie Mulan, and my answer to that is they may base her more on the legend version of Mulan, where I think many of these things would make more sense. Interestingly enough, one version of the story actually has Mulan kill herself. While this seems pretty dark for Once, the way they have set up the character, a suicide would not be completely out of the question. Anyway, the name of Mulan's father is Hua Hu in one written adaptation and Fa Zhou in the Disney version, so if The Dragon gets his name revealed as either of those, we know he is Mulan's father. If you want to see more about the Mulan legend, here is a link: https://en.wikipedia.org/wiki/Hua_Mulan