Hi everyone!

So, I was thinking...if the Dragonborn finally dies, or just visits Sovngarde again, but his/her spirit only...and he/she has the soul of a dragon, then his/her spirit will be a dragon? Or will the Dovahkiin stay in his human form after leaving his body (or hers)? Could he/she fly around in the spirit realm, collecting lost, but brave souls, becoming the polar opposite of Alduin?
I'm just curious.