>>280146760
We know that most Celestial dragons take commoner wives but we have not seen any that have tried to take a princess
Gunko is a princess of Brook Kingdom and was sold by her father as a bride to the Manmayer family
I think wives of noble families can become Celestial Dragons, rather than commoner wives.
Gunko became a Holy Knight because she killed her sadistic husband. She was used as a guinea pig by Saturn as punishment to create a vessel for Imu. There must be a reason why Gunko hides her face.