Yes, the pixie Beyblader of Barthez Battalion, Mathilda should've been the 5th Bladebreaker.

The Barthez Battalion is a team with a history of cheating although looking at Mathilda and even the other team members, it's clear that it's against their will, Mathilda getting hit particularly hard by this when she's told to shatter her Beyblade to take out Daichi, but her teammates share a strong enough bond to band together and get her back on her feet, expect team reviews to follow these character reviews as Barthez Battalion is fascinating to analyse compared to real life sports teams.
Now why do I think she's suitable for the Bladebreakers?
1. Her design shouts marketable beyblader as she looks most the part compared to the others, the designs of the other female characters make it obvious they were designed for a themed team but Mathilda can be any team as her design is contemporary for the franchise she's in.
2. Her design itself is sporty and has the one thing missing from an anime like this, goggles, she also has an obvious pink ranger vibe and comes into the team with a clean slate so good news shippers, she can be paired with any one.
3. If you don't believe me on her design, sequel series Metal Fight Beyblade's main female Madoka Amano is basically Mathilda as a brunette with added mechanic skills.
4. She's just flat out adorable, although I prefer Mariam and Julia as characters, Mathilda is a worthy bronze medal.
But were stuck with Scrappy-Doo Daichi, so what can you do?