Matilda (Nancy Crane)

Matilda was a nurse working at Gotham General Hospital.

The Joker kidnapped her, then put on her uniform to visit Harvey Dent in his room.

Behind the scenes

 * Matilda's name is seen on her uniform's badge.
 * The Joker places an "I Believe In Harvey Dent" sticker on the nurse's uniform.
 * Matilda is the name of Heath Ledger's daughter.