Background:
Jazz Bluster is the daughter of Rainbow Dash and Soarin. She’s also Applejack’s stepdaughter.
Since she was a filly, Jazz was always seen as a mini Rainbow Dash, so naturally, everyone expected her to be a Wonderbolts when she grew up. But all the expectations ended up driving her away from that goal, so she ended being more rebellious than her own mother was. This led to her being against becoming a Wonderbolt and more drawn to being a daredevil.