I think Bella was puzzled because of her feelings.. and when she found Voldy who needs her she decided to follow him.. even in death...
R.I.P. Elphaba I luv U, Green is hope!!! Elphaba was not evil!!! She was lonely...
No one is ever born bad... you can only push someone so far...

So if you care to find me
Look to the Western Sky
As someone told me lately
Everyone deserves the chance to fly!
And if I'm flying solo
At least I'm flying free
To those who'd ground me
Take a message back from me
Tell them how I am
Defying Gravity
I'm flying high
Defying Gravity
And soon I'll match them in renown
And nobody in all of Oz
No wizard that there is or was
Is ever gonna bring me down!

Enyoing your world means making it bigger. The world one person sees is tiny, you gotta reach out to other people! Only by allowing strangers in can we find new ways to be ourselves.
Give up to the world and you give up to yourself!