Once upon a time there was a bird, it was a small parakeet,it was plump with a red face leading down to its chest, a green band led into small yellow legs, and it had small,black, beady eyes, eyes that saw all.
The parakeet began life sadly, born into an illegal bird trade, the first few months of its life were spent in dark damp cages, crushed on all sides by older and stronger birds.
When they were finally set free the future still seemed bleak, the police had no idea what to do with thousands of foreign birds, the logical explanation was to give them away, the police and detectives got first pick.
A certain detective, a light yagami, knew that his fiancée misa would love a small bird, it would keep her company when he was gone, more importantly it would make it seem like he cared about her.
Misa amane, the fiancée of detective light yagami, was overjoyed, it was a small fluffy chick, she bought it a cage and set it in the corner of the room;where the bird could watch over the room like a king, misa amane his many secrets behind fake smiles and false giggles and no one can keep a secret forever, it's not in human nature.
So the solution seemed obvious,to her at least, and she told the small parakeet all about her life, about beings more important than itself, more important than even humans, she told it tales of a small black book that changed her life, of her dead parents and her savior Kira, of all the murders she committed and of the guilt she sometimes felt, every day misa talked to the small bird, she named it: Rem after someone she'd lost in the quest of justice, and on nights when her fiancée didn't come home she would sit with the bird and tell it her worries.
After some time misa amane took the black notebook that held so much power and she touched it to the birds claw, introduced it to the shinigami Ryuk who joined in misa's habit of talking to the bird when the humans were gone.
Eventually misa stopped telling the bird about her past, in fact she seemed to forget it as a whole, the shinigami Ryuk told the bird that her memories were gone like they had been once in the past, so the shinigami told the bird the rest of the story, and when misa amane jumped off a building after her fiancée died
The bird went to live with another detective, he was a boring man with boring stories but he spoke often of the birds old owners.
If Rem could speak so many lives would have been saved. The all seeing, all hearing bird.