The actress who took the roll of Dolores Umbridge

1st here is some information about Dolores Umbridge :
Gender : Female
Hair colour : In book 5 : Mousy Brown
Eye colour : Greyish Blue
Allegiance : Ministry of Magic
Actor : Imelda Staunton
First appearance : Harry Potter and the
Order of the Phoenix
this is the pic of Imelda Staunton :

I really didn't imagine her like this but I wish that she will be good in being evil because she look full of innocence .
What do you think ?