It is unfortunately agreed upon that before its conclusion, CW's, The Flash's, current roster of members making up Team Flash was looking excpetionally bleak - it also never got better as the show progressed.
Chester P. Runk, Cecile Horton, Khione, and everyone's favorite, Allegra Garcia.
First introduced way back in Season 6, Allegra Garcia was a comic book character created a few years prior, by new showrunner at the time, Eric Wallace.
Allegra never served any true purpose to the team - neither to the show, outside of using her UV-ray abilities to stop Ramsey Russo's (Bloodwork's) dark matter blood infection during the first half of Season 6.
From there, Allegra has awkwardly been hanging around the show; often times undergoing very small ventures of her own storylines, and even smaller doses of character development.
However, a new deleted-scene from The Flash Season 9 Blu-Ray & DVD set, features Allegra Garcia speaking on Iris West-Allen's 'Citizentopia' podcast in the series finale, where she reveals herself to the world as Central City's newest crime-fighting meta human known as... Wavelength.
While the name is not great... or, let's be honest, not good; this deleted-scene surprisingly serves as a nice introduction to Allegra's crime-fighting meta human journey after The Flash has ended.
Even though Allegra does not have any value to Team Flash - outside of being just Chester P. Runk's boyfriend; focusing on her abilities more, instead of the whole will-they-won't-they cliche between Chester would have initially made Allegra a more compelling character on The Flash, had the show addressed this matter before.
Do you like this deleted-scene from The Flash Season 9?
At 11, Barry Allen's life changed completely when his mother died in a freak accident and his innocent father was convicted of her murder. Orphaned Barry later becomes Detective Joe West. Now a crime-scene investigator, his dedication to learn the truth about his mother's death drives him to follow up on every new scientific advancement and urban legend.
When his latest obsession - a particle accelerator heralded as a world-changing invention - causes an explosion, it creates a freak storm and Barry is struck by lightning. He awakes from a coma nine months later with the power of superspeed. When he learns that others who have gained powers use them for evil, he dedicates himself to protecting the innocent, while still trying to solve the older mystery.