Talk:Guardian Dragon Soul/@comment-31811520-20171128014623/@comment-4511886-20171128130126

Souls are the source of all life. This is one of the fundamental facts of the Dark Souls universe. If a dragon didn't have a soul it shouldn't be able to live, and if they could live without a soul, the game would most likely point it out at some point in the lore, which it does not.

There's also the fact that every dragon that can be killed in Dark Souls drops souls, and souls dropped are based on the power of your own soul (thus why higher level players drop more souls than low level ones). There's also the Storm Curved Sword, which proves that dragon-kin have souls.