Talk:Rainbow Dash/@comment-15629929-20150905225554/@comment-5837525-20150905231731

Any number of reasons, "she's cool" maybe being the most common. People always latch onto the character or characters they relate most to, and Rainbow is one of the series' most relatable. She's tomboyish, she's athletic, she's competitive, etc.

Perhaps one of her biggest draws is that, among the main cast, she challenges a lot of preconceptions and stigmas that come with the My Little Pony brand. Because what's the first thing most people only familiar with earlier incarnations of MLP think of? Bright colors, constant smiling, tea parties, over-sugary songs, blah-blah-blah. Rainbow Dash is pretty much the opposite of this, which makes her easy to like and attributes to her popularity. (I don't know about 70%, but whatever.)

But like I said at the beginning, it can be any number of reasons.