Princess Cheyenne was gifted with her powers and they knew it was a gift from Glaux, but they didn't know it was her who was controlling the day and the night. She grew up in a life of happiness and knowledge as she had spent many years studying things and reading books. There was peace and prosperity as she always beamed a smile and made sure her people were as happy as she was when it came to her image as Princess of Tyto.
Meanwhile, in Ambala, Mordecai had brought upon himself to try and make the night longer, though he didn't know he had his powers. He hated having to rest when he was a child. He brought upon fights, power and chaos. He was expelled from many schools as he wanted dominance over the rest. His parents sent him away to a reform school and he had managed to burn it down by the time he got his dark magic power. They had realised that he is an abomination and won't be stopped. He is the very name of evil as he brings doom and destruction with everywhere he goes with his dark magic and power lances. Mordecai had brute strength, a sharp mind and control over the night, though he didn't know it.
Glaux had thought it time to tell the two gods of their powers as it was time to unite the forces in harmony. However, he knew that Mordecai is pure evil and that he would kill Cheyenne to take control over the forces. Nya Strata (Strata is her maiden name and she later becomes Nya Schana-Strata by taking her second husband's last name), his wife, suggested that they wait until they will understand. He takes her seriously as the pair of owl gods, they both have been keeping an eye on, have both only had reached adulthood and are just realising what they want to do with their lives.
Cheyenne had decided to travel the world when she had become an adult. She travels all around the owl world spreading the gift of longer days to all as she flies around to learn new things and see sights and things. There was a twilight when she had come to Ambala. The whole kingdom was in twilight from Mordecai and Cheyenne's powers colliding. It unexplainable as no one knew what was happening. When Cheyenne had left the forces of light and dark became normal again.
While she was traveling, Glaux and Nya knew that they had to tell, at least, her. The Goddess of Snow, Nya, knew what the ominous twilight was about. The forces were more active than they both have thought. They had found and spoken to Cheyenne and she understood that with her powers, she has to be responsible, only realising that she has control over the sunlight. She then bids them farewell as her travels are not over.
She had travelled a long way and when she was flying over the Sea of Hooleamere, she had spotted a small tree that was growing on top a rock and some owls around it. She had an idea and she used her powers to grow the tree into what it is now, The Great Tree. Hoole and his allies were there and they had named it Ga'Hoole as the tree seems to be holy and after the young king, but were astonished to see the young goddess and what she had done. They looked around for her as she was hiding in the tree.
Cheyenne appears to them later, on her own accord, and explains what she had done to grow the tree. She had explained what good intensions can do and why people should be good and keep the already maintained peace that Glaux had given them. They had decided to form the Guardians of Ga'Hoole to do what is right when it comes to the ideals of truth etc.
However, things weren't good when the Guardians were created. Mordecai soon realised that his powers can be used to take over the owl world. He dares to disturb the peace as he is cold-heated and does horrible things. He creates the Pure Ones and they follow his every order.
Not knowing it, Mordecai and Cheyenne have created the now everlasting war between Guardian and Pure One.