6 and 5. Chester P. Runk / Allegra Garcia
We’re ranking Chester and Allegra together because, honestly, they were perfectly fine additions to The Flash when they both debuted in season 6. Chester was the socially awkward-but-lovable guy who accidentally stumbled onto Barry Allen’s secret, while Allegra was the edgier young woman who formed an unlikely bond with Nash Wells. Unfortunately, any originality that the pair brought had evaporated by the eighth season.
The show sacrificed any kind of meaningful development they underwent to instead shoehorn them into a romance. While they certainly have chemistry and are admittedly cute together, the show refused to actually put them together, attempting to pull off a will they/won’t they romance that took up way too much screentime.
By the time the final season of The Flash rolled around, Chester and Allegra were still taking up valuable screentime and the audience simply did not care enough about their would-be romance. It was also infuriating that the decision was made to kill off actual important Flash characters like Frost and Caitlin Snow while keeping them around.
These two had so much promise when they were introduced, but they were never meant to be main characters, so giving them too much screentime just to take their romance around in circles was literally wasting all of our time.