Well, what ani_d is hinting at is some sort of an
everyman hero. The difference is that she's an everyman hero born with latent superpowers, so she goes from being "average" to "exceptional" in a remarkably short period of time.
It's the same idea as an "instant mecha pilot". He's enough of a blank slate that you can project yourself into him, he starts out ordinary enough that everyone can identify with him, but then his latent powers suddenly kick in and he's the greatest guy in the universe. It's the ultimate in wish fulfillment.
The problem is that powers like these tend to overshadow the character themselves, and it becomes difficult to get a sense of
who the character really is.
What's more, when you have two such blank slates in the same series trying to hold a conversation with each other, well... it doesn't make for very good dialogue.
