A character in Henrik Ibsen’s play that could be considered admirable is Nora Helmer. She is a person who tries to take care of her loved ones. To pay for their trip to Italy and save her husband’s life, Nora fakes her father’s signature so that Nils Krogstad will give her the money that she needs. Although what Nora did is against the law, it’s possible to admire Nora’s actions because they were for selfless reasons.
One might also like Nora because of how conscientious she is. She is distraught about what she did and its potential consequences on her husband. It’s valid to admire Nora’s attempts to deal with the mess that she made on her own.
When Nora's husband discovers what she did, and cares more about his own social standing than Nora’s arguably good deed, Nora, for this and other reasons, leaves him. This demonstrates independence and self-worth on the part of Nora—two qualities that tend to warrant admiration.
As for a character that one might have a hard time liking, consider Nora’s husband, Torvald Helmer. Helmer treats Nora in a condescending manner. He calls her a “little lark” and “my squirrel” as if she’s a tiny animal and not a full human. More so, as mentioned, he reacts to Nora’s compassionate crime by first thinking about himself.
For a character whose likability and admirability is a tad bit complicated, focus on Nils Krogstad. One could cite his threats and manipulation of Nora as unlikeable and deplorable. Yet as the play unfolds, Krogstad shows remorse and emotion that could make some warm up to him and deem him fit for admiration.