Perhaps a theme of redemption could be present. Maybe Gordon Dioxide made some mistakes in the past and the 'life story' is about how he tries to make up for those mistakes and find a new purpose in life. It could also be about the pursuit of a dream. He might have had a big goal or a passion that he chased throughout his life.
I'm a bit confused as 'dioxide' is usually a term related to chemistry, not a common part of a name. Maybe 'Gordon Dioxide' is an alias for someone in a very unique situation or a fictional world. The 'life story' could be filled with adventures, challenges, and achievements, but without further information, it's really just speculation.
In bedtime stories, Gordon Dioxide could have a special relationship with the stars. Maybe he gets his energy from the stars at night and uses it to tell his stories. He could be a sort of storyteller envoy from the world of elements to the world of children. His unique property of being 'Gordon Dioxide' gives him a mysterious allure in the stories, making children wonder about his true nature.
One bedtime story could be that Gordon Dioxide was once a normal part of the air, but then something magical happened. He was given the ability to communicate with humans. He decided to use this power to tell children bedtime stories. He would start by talking about his origin, how he was formed from different atoms coming together. Then he would go on to share tales of his travels around the world, carried by the wind, and all the different places he has seen.
A third possible theme could be self - discovery. Perhaps through their interactions with each other, both Gordon and Charlotte learn more about themselves. Their story could be about how they changed and grew as individuals as a result of their relationship, whether it's a friendship or a romantic one.
Friendship or comradeship is another possible theme. Alyx and Gordon are both part of the resistance against the Combine. Their relationship, how they trust and rely on each other, could be explored. It could show how their friendship grows stronger through shared experiences.
One possible theme could be loss. It could be the loss of a relationship, a possession, or even a sense of self. Loss often brings about great sadness.
Honestly, your past life story could be anything. Maybe you were a simple farmer, or a noble person. But it's all in the realm of fantasy and conjecture.
One possible theme could be growth. Just like a tree starts small and gradually becomes large and strong, it can symbolize personal growth. Another theme might be endurance. Trees face all kinds of weather and still stand, similar to how people endure difficulties in life.
Another theme could be the simplicity of life. A dog's life is often centered around basic needs like food, sleep, and play. The story might highlight how these simple things can bring great joy and contentment. Also, the theme of friendship might be present. Whether it's with other animals or with humans, the dog's relationships could be explored to show the importance of friendship.
One possible theme could be friendship. The relationship between the human and the chimpanzees might be presented as a form of friendship, showing how different species can connect on an emotional level.