Short answers, pulled from the story.
Rey was created by Lawrence Kasdan, J. J. Abrams, and Michael Arndt for The Force Awakens (2015), the first film in the Star Wars sequel trilogy. She was primarily portrayed by Daisy Ridley across the trilogy.
Daisy Ridley primarily portrays Rey across The Force Awakens, The Last Jedi, and The Rise of Skywalker. Cailey Fleming played a child version of Rey, and Helen Sadler has voiced the character in several video games.
Hasbro left Rey out of some Force Awakens merchandise, including a Monopoly edition, and said her absence was meant to avoid spoiling the plot. Lucasfilm Licensing's Paul Southern said the company wanted to protect the secret that the Force awakens in Rey and that demand for Rey products had been underestimated.
Yes, The Rise of Skywalker reveals Rey as Emperor Palpatine's granddaughter, and the novelization states her father was a nonidentical clone of Palpatine. Palpatine's assassin Ochi killed her parents but never located Rey herself.
The Rise of Skywalker reveals that Rey and Kylo Ren share a dyad in the Force, a connection co-writer Chris Terrio described as being 'sort of soulmates in the Force' and 'twins of fate, twins of destiny.' Directors Rian Johnson and J. J. Abrams have both described their relationship as a romance.
A new film starring Daisy Ridley as Rey was announced at Star Wars Celebration 2023, directed by Sharmeen Obaid-Chinoy and rumored to be titled New Jedi Order. It is set fifteen years after The Rise of Skywalker and centers on Rey rebuilding the Jedi Order, though no release date has been announced.