More to my Legend of the Sirens canon. (SPOILER FOR THE FANFIC!!) >.<
 
So LOS is a Godzilla crossover with EQG series where Godzilla is the Dazzlings father as well as the entire siren race. For the generation at least.
 
After being banished to the human world the Dazzlings went through many identities while they lived among humans. For her last identity before rejoining her sisters in Canterlot, just prior to Rainbow Rocks, Adagio went by the name Razzle Dazzle. She joined the Air Force with forged papers and ID and rose to the rank of Colonel alongside Spitfire. The two had an intense rivalry and both wanting to join the mysterious G-Force squadron which Spitfire ended up getting instead of Adagio.
 
Dagi then went on to manage the Super X program before it was suddenly defunded and shut down indedinatly. After which she went into retirement and rejoined Aria and Sonata.
 
All the while Rainbow Dash was CHS’s top athlete. Like her mother, who was in the Air Force before passing in this canon, Rainbow wishes to join the ranks and become a pilot like her mother was.
 
This lead to a HUGE cooperative streak in her and drove her to become the best she could. As a side effect of this she developed a strong sense of comradery with those she worked with. Whether fellow athletes or close friends, Ranbow Daring Dash never leaves anyone behind.