In A Doll's House, who speaks more directly throughout the play?

Of course, this play has so much to do with reality
and façade, and this is something that the key characters represent brilliantly. One
cannot but help be struck by the relationship of Nora and Helmer and its artificiality
from the very first lines of the play:

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Helmer
(from his room). Is that my skylark twittering out
there?

Nora (opening
some of the parcels). It
is!

Helmer. Is that my
squirrel rustling?

Nora.
Yes!

Helmer. When did my
squirrel come home?

Note the
childish names that Helmer comes up for his wife, and the way that Nora plays the role
that he gives her by accepting those names.

However, the
play is the story of Nora's gradual realisation and acceptance of what her life and her
marriage is really like, and how she is utterly trapped and imposed upon in her
position. Note this key speech from Nora in Act III:

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You've always been very kind to me. But our home
has never been anything but a playroom. I've been your doll-wife, just as I used to be
Papa's doll-child. And the children have been my dolls. I used to think it was fun when
you came in and played with me, just as they think it's fun when I go in and play games
with them. That's all our marriage has been,
Torvald.

Here we see a Nora
who now is speaking directly, after playing the role of her husband's doll so well
throughout the play. She has come to see her life and her marriage for what it is, and
key to this is she has seen that her relationship with Torvald is just a continuation of
her relationship with her father--she has never been allowed to develop into an
independent, mature female, as her relationships with men have always kept her as a
"doll" or a little girl.

Thus it is Nora who, out of all
the characters, changes most from the beginning to the end of the play in her dialogue,
as she becomes more and more direct and truthful about her life and her
relationships.