These "relatables" are a generational thing, Everyone thinks Pryde was the first teen sidekick for the X-Men but the original team was all teenage sidekicks to ProfessorX.
After Pryde there was Rogue, after Rogue there was Jubilee, after Jubilee there was that Marrow phase...
These days there seems to be a competition for relatable teen X-newb.
Pixie was just one of many in the New X-Men academy book, Armor was the relatable sidekick in Astonishing', then (godhelpus) there was Wolverine's school...
This is just something X-Men books do, even the spin-offs have newbs join up.
Anyway... we all know Eva Bell is the best.