Describe the rules of this world and then write the backstory of a character who experiences this phenomenon.
In this world, every sentient creature undergoes reincarnation on the annual solstice. At the moment of death, their spirit is released from their body and enters a pool of spirits, where it is randomly assigned a new form and sent back into the world to be born again.
The rules of this world dictate that all creatures possess the innate ability to communicate with one another telepathically, regardless of their species. This allows for the transfer of knowledge and memories from one life to the next, and allows for a sense of continuity despite the fact that each individual takes on a new physical form each year.
There is a great diversity of species in this world, ranging from small insects and rodents to great whales and dragons. Some creatures are highly coveted in certain cultures, and it is not uncommon for families to go to great lengths to ensure that their loved ones are reincarnated as a desirable species.
One such individual is a character named Aria, who was born as a human in a small village on the outskirts of a great forest. From a young age, Aria was fascinated by the magic of reincarnation and spent much of her time studying the ancient texts that described the process.
As she grew older, Aria became more and more determined to uncover the mysteries of the spirit realm and learn the true nature of the cycle of reincarnation. She became a skilled sorceress and spent many years traveling the world, seeking out ancient artifacts and studying the lore of long-forgotten civilizations.
Eventually, Aria discovered that the cycle of reincarnation was not random, as she had always believed. Instead, it was governed by a great and powerful force that existed beyond the physical world. Determined to understand this force and harness its power, Aria devoted her life to studying the arcane arts and delving into the depths of the spirit realm.
Through her research, Aria learned that the cycle of reincarnation was not only a way for the spirits of the world to experience new forms, but also a way for the universe to maintain balance and harmony. She realized that her own desire to manipulate the cycle was selfish and shortsighted, and vowed to use her knowledge and power to protect and preserve the balance of the world.
And so, Aria spent the rest of her days traveling the world, using her magic to heal the sick and injured, and helping to guide the spirits of the deceased back into the cycle of reincarnation. She became a beacon of hope and a guardian of the natural order, remembered by all who knew her as a wise and selfless servant of the spirit realm.