love the book right? im really happy that some of the
charcters turned out good in the ending or was
redeemed, and i hope we share the same thoughts about
it, so cast in your best "redeemed" character and post
in why...
here's my thoughts...

Dudley Dursley - after long and long years of taunting
and jeering Harry, he has come to the realization that
Harry isnt a waste of space and remembering that Harry
save him from the dementors, shook Harry's hands
too..clearly unexpected!

Kreacher - From passing information to Voldemort,
happy to be with Bella and Narcissa, murmuring offensive
words, he was then understood by just being loyal to his
kind masters and therefore to Harry as well, serving
them (with Ron and Hermione) while staying at
Grimmauld Place, he then admired Regulus' bravery for
standing out to Voldemort and ended up rallying
Hogwarts' house-elves to fight Voldemort...

Percy Weasley - from being Ministry's pet and
abandoning truth and his family, he turned out at last
before the battle starts, saying sorry for everthing
and admitted he's ministry-loving, family-disowning,
power-hungry moron...bonus points for shielding Fred's
dead body from further harm...

Severus Snape - where to start? from taunting Harry
from book1, we loathed him as Harry loathed Snape but then
he turn out to be a brave, trustworthy, outstanding
headmaster with 20 convincing memories to boot!! cant
enumerate all of them...

Albus Dumbledore - name was dragged to ground after he
died, the truth and lies, family history, death of
sister, friends with Grindelwald, all in all his past
was revealed, it was unbelievable and admit it you too
have doubted him too in the middle of the book, but
then he was redeemed too at the ending, Harry, assured
Dumbledore was never free from guilt, and Dumbledore
resented everything what happened and still turned out
to be our beloved Dumbledore we always loved...

The Malfoys - hesitant from book6, Draco cant kill
Dumbledore, and still Harry save Draco from burning
rumble, Narcissa being gentle to Harry while
inspecting if he's dead and told Voldemort that he is,
and in the end, turned to the good side...