Nope, Kobayashi has been developing Tenma and Eri at a faster rate since Yakumo got Tenma to help Harima on his manga; Yakumo hasn't received much character development since Chapter 206, unless you consider giving mysterious stares to be character development. She might have some serious development in the future, but it still hasnít happened yet.
Originally Posted by shimano87
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you. - Friedrich Nietzsche