World of Warcraft
in the last Expansion " Warlords of Dreanor "
you help Archmage Khadgar all over Dreanor , Cordana Felsong who you could call his body guard help you by giving you quest and protecting Khadgar while you quest around , when you get the Orb of Dominion to Free Garona ( an Orc Assassin working for Gul'dan the villain ) , she take the orb to Destroy it , but
Gul'dan use the orb and corrupt her , she goes away and you don't see her until the new Expansion
in The new Expansion we see her with Gul'dan , now her armor showing her new corruption
( Picture before and after )
Also in the Expansion
a Demon stab Ysera ( a Dragon Aspect kinda a mini god )
With a Red Gem that corrupt her
She is corrupted in her Dragon form , she has a Human form , but finish the quest so i don't know if we see her in human form or not
since this Expansion main focus is on Demons , i expect more corruption
will post once i see more