See, now I think there's even worse of a split personality. Rainbow just isn't right in the head me thinks. AS well, could this be caused by a repression of what she actually wants? Gosh, the possibilities are endless at this point.
Rainbow Dash loves fashion but fears her reputation becoming a Wonderbolt would be effected, so she created the persona Photo Finish and was able to express her fashionable side. But after becoming to famous, she found it hard to find some time and peace to herself, so she created this new Persona so not only she can keep wearing her favorite fashions, she other friends to talk about fashion, movies, and stallions. She has not said a word to Rarity over the fear she might spill the beans and everything she has been working up will be ruined. I MUST MAKE A FAN FICTION... Never written one.. But would be fun... RAINBOW DASH: THE SECRET LIVES