Orainio was first discovered as an egg at the beginning of the new year in 2012. The nest was in a cave near the top of a waterfall, between a lush mountain range and a desert expanse. It contained two shadow dragon eggs and two rainbow dragon eggs. Scientists immediately began monitoring this new discovery.

A few days later during a rainstorm, two rainbow dragons were seen leaving the cave. One, a female, flew off and out of sight. The other, a male, stayed nearby, but not too close to the cave from where he had hatched. Later, he was named Orainio, inspired by the Greek word for rainbow.

His friendly and curious personality won the hearts of many researchers, and led to some insightful discoveries.