There are specific storylines within the New 52 Flash series where Wally gets powers. These often involve complex plot developments and encounters with powerful forces.
I have no idea who Wally Purling is in this story. However, if we assume it's a typical Christmas story, Wally Purling could be the protagonist. He could be an ordinary person who has an extraordinary Christmas adventure, or he could be a symbol of the Christmas spirit, spreading joy and kindness during the holiday season. But this is just speculation without knowing the actual story.
Wally and Kuki are likely characters in a particular fictional universe. They could be from a TV show, a video game, or a comic. Without more context, it's hard to say exactly who they are, but they are the focus of the fanfiction, which means fans are interested in exploring their relationship, be it friendship, romance, or some other kind of connection.
The Flash was a superhero in the comic series that first appeared in 1966. Since then, The Flash has been one of the most popular superheroes in the comics and has undergone many adjustments and expansion in different versions.
The Flash's superhero identity came from a parallel universe called " Flash Point." The Flash in this universe somehow went back to the past and changed history, causing the Flash in other universes to have different abilities.
The Flash has many different superpowers, including faster movement speed, perception beyond time and space, and the ability to convert and store energy. He also had some allies, including the Green Arrow, Superman, Wonder Woman, and so on.