I think Nora is a very mature person. After watching the last part of the play, i realized that Nora has been acting as two distinct person. Childish and flirty towards Torvald and caring to others. It's hard to say that Nora have been responsible and adult like, since she has a limited education and knowledge about what's going on around her. Eventually, she realizes how much she's been missing.
I don't think Nora is a spendthrift, because she saved some money by not spending every money to buy her clothes and toys for her children. Also, she worked in a room by herself before the christmas. This tells me that she can control herself even if she acts like a child.
i think that nora is both a spendthrift and mature. well in the beginning she was a spendthrift, but as the story goes on, she becomes mature. well, before we knew that krogstad had borrowed the money to Nora, i thought, like jooyoung said, she was having an affair. after all, i realized she was a bit flirty to people, and would have no difficulty of getting what she wanted.
well at the beginning Nora was all "yolo" and very childish, she looked like the type of person that spends money like there aint no tomorrow, but then in the end she slowly started to under stand the world and become kinda mature
the problem of nora is that she is not well educated so that why she acts childish and a spendthrift just like a child and she doesn't know that her husband controls her, if nora was well educated she would stand against her husband she would not be manipulated by her husband which her husband is afraid of!!!!!!!!