(Hayao x Kumiko During Ancient Times - The Immortal Couple)
Here are the "former" human forms of Emperor Hayao and Empress Kumiko of Ancient Nippai/Sammer Kingdom.
After Lord Arceus/THE DEITY chose this married royal couple and gave them "immortality", the two eventually became the "Legendary Pure Crystal Immortals" who temporarily defeated Clydon the fallen star-spirit.
Let's just say these immortals have been around for 10,000 years, up to the present time period in my Mario/(Crossover) Fanfic.
The Emperor/(Hayao)/Master R.O.B.'s origins
The emperor was already in charge of the R.O.B.s' Gyrotronic Civilization, the emperor made a wish to Unarpan (a gigantic wish-making clock) for a machine that can transform his body into a hyper-advanced cybernetic body. The emperor then used his hyper-advanced cybernetic body to transform himself into a powerful R.O.B. that is imbued with holy star-spirit magic and has the capability to fight the dakumata. This is how Master R.O.B./(Hayao) came to be.
The Empress/(Kumiko)/Queen Fairy's origins
The empress met an old Maiden of the Cosmos from outer space who gave the empress knowledge on star-spirit magic and how to create little winged beings by tying magic paper strips onto flowers to create fairies and sprixies. The empress used a powerful irreversible star-spirit magic spell to transform herself into a powerful Fairy. This is how the Queen Fairy/(Kumiko) came to be. She was also known as "The Long-Lost Monarch".
(Hayao x Kumiko During Present Times - Married for 10,000 Years)
Hayao the R.O.B. and Kumiko the Fairy's Destiny
Master R.O.B. and the Queen Fairy were then given pure-crystal powers from Lord Arceus and both became the Pure-Crystal Immortals. They encased Clydon in Spirit-Crystal.
After Hayao and Kumiko encased Clydon in pure spirit crystal and stopped the dakumata, Hayao and Kumiko turned the Pure Crystal Rod into the "Crystal Shard" from Kirby 64.
Despite Clydon being physically encased in crystal, he still had a non-physical form that was still a danger in Mario's World during ancient times... (aka, Zero/0-Two). Due to this danger, Kumiko and the fairies needed to take the "Crystal Shard" with them and leave Mario's World in ancient times. Kumiko and the fairies eventually found "Ripple Star" and made it their home...
Hayao and his R.O.B.s on the other hand had stayed in Mario's World for the past 10,000 years, up to the present times in order to fight evil empires and demonic dakumata. This is how Hayao became known as "The Guardian Lord of the World".
Master R.O.B. and Queen Fairy have telepathically communicated to one another from the long distance between Mario's world and Ripple Star to keep in touch for 10,000 years. During the 10,000 years before the present times, Hayao and a few R.O.B.s would occasionally visit Ripple Star (via spacecraft) to see if Kumiko and the Fairies were doing okay. (This is how Hayao and Kumiko maintained their marital relationship.)
(These are not my characters, R.O.B. is the intellectual property of Nintendo, The Ancient Minister is the intellectual property of Nintendo and HAL Laboratories. The Queen Fairy is the intellectual property of Nintendo and HAL Laboratories.)