The Flash mantle has been taken by several heroes throughout the DC Universe, though two characters in particular have defined the role the most: Barry Allen – the Silver Age Flash – and his sidekick and nephew Wally West, who would become the new Flash after Barry's death. This led to decades of stories in which Wally truly was the fastest man alive, with the Scarlet Speedster romancing Linda Park – the love of his life.
Source:https://www.cbr.com/dc-wally-west-linda-park-need-tv-movie-adaptation/