Nora Helmer
The protagonist. She appears playful and naive at the start, but the play gradually reveals she is resourceful, emotionally intelligent, and capable of serious independent action. Her arc moves from performance to self-recognition. By the end, she is the most clear-eyed person in the room.
Torvald Helmer
Nora's husband and the bank manager. He loves Nora in the way someone loves a pretty object: he wants her cheerful, decorative, and dependent. When the crisis hits, he reveals that his love was always conditional on his own comfort and reputation.
Krogstad
The man who holds Nora's debt. He is the play's apparent antagonist, but Ibsen gives him a real backstory. He made a mistake years ago that ruined his reputation, and he has been fighting to rebuild it. His relationship with Mrs. Linde shows he is capable of genuine feeling.
Mrs. Kristine Linde
Nora's old friend. She made hard, practical choices to survive, including marrying without love. She is steadier and more realistic than Nora, and she acts as a contrast: a woman who adapted to the system versus a woman who finally rejects it.
Dr. Rank
A family friend who is dying of an inherited illness. He loves Nora quietly and without expectation. His presence in the play adds a layer of genuine warmth and also shows Nora what honest feeling looks like, which makes Torvald's conditional love look worse by comparison.