She's actually got quite an interesting story once you put the small clues together. I don't know if the writers intended any such thing, but...





We first see her in Canterlot, where she seems to know pre-Ponyville Twilight. This at the time in Twi's life when she's usually at the Princess's side or in the castle library and isn't easy to know. On top of that, she's one of Cadence's bridesmaids (though the real one was replaced by a Changeling at the time.) That hints that she's pretty important. Yet, she chooses to live in Ponyville. She and Bon Bon have known each other since they were children (according to Pinkie Pride flashbacks.) Also, she can often be seen hopping up and down with a giant grin in several episodes.





So, I get the idea that happy excitable Lyra doesn't get along with the stuck-up Canterlot elite that she's related to - she wishes they weren't so full of themselves, they wish she'd act like a "proper lady" instead of a "low-class ruffian." She and Pinkie probably identify with each other a lot - they're both in Ponyville because they're just not a personality match for the lives they were born into. However, she knows how to get along in those circles well enough to have friends in very high places, and she probably has way more bits than anypony would ever need even if she chooses not to live like it. That cutie mark means she was probably known for her music, we're talking high society orchestra type like Octavia. Outside Bon Bon, Twilight and Octavia, nopony knows she's one of the top ten most rich and important ponies in Equestria.





("Where does the human obsession thing fit in?" one might ask. To me, it doesn't. I've never been a fan of all-humans-all-the-time Lyra. Like I said, she's quite an interesting character when you add up what we have on her. A fun addition to a bigger characterization, like muffins to Derpy and, would be okay, but she hardly ever gets depicted as doing anything not human related, all else ignored. She's treated better in longer fanfics treat her better, though. However, someone who did feel the 'humans' thing was essential might figure that, since the mirror leading to the EQG universe resides in the Crystal Empire, it was through her association with Cadence that she learned about humans.)