Who is Riley Bloom from Evermore: The Immortals and what is their importance?

Ever's younger sister, Riley died in the car accident that also claimed the lives of their parents. When Ever lingers in the moments after her death, she loses sight of Riley and their parents, and believes they've gone on to the other side. However, Riley actually realizes that Ever has stopped and so turns back at the last moment. That decision means Riley is stuck in the present. Riley spends a great deal of time wandering around, watching former acquaintances and even celebrities. She connects with another psychic and when Ever releases her, Riley joins their parents.