Agnes is the daughter of Mr. Wickfield, the Betsey Trotwood's administrator, and she, whose mother has died when she was born, acted as the governess of the home all her life. She is always helping and taking care of her father, who is depressed since the death of his beauty wife, and when David enters in her home she became his intimate friend, she is always ready for hear his confidences. She was in love since the first time she met him and however she counseled him in all his troubles of love

          There is in the home a young man called Uriah Heep who is presuming of his humility always but he is a conspirator against Agnes' father. Agnes has to tolerate Uriah and his mother constantly and she don't imagine that they want her to be married with Uriah someday.

          She is a very affable and and loving girl, and friendly too, we saw it because she is friend of the poor Dora although she is married with the man she loves. She is friend of the wife of David's teacher though her parent disagree with this friendship because she thinks she is disloyal with the kind doctor, but when in the end of the novel we know she is innocent it is demonstrated that Agnes looks more inside the heart than the appearance.

          As the loyal friend of  David she went to met Dora in the origin of their relationships  and immediately began to love her and her extreme whiteness too.

          Agnes is the last person Dora wanted to see in her life and she made call her the day she would died, in that last meeting Dora said her that she would substitute herself in the life of David and she would take care of him. When the tender-hearted Agnes descends where is David and indicates the sky with her finger is one of the more trembling scenes of the novel.

          After a David's long travel for Europe, he noticed that he is in love with Agnes since the beginning of their friendship but she is idealized and it is for this that he never said her nothing; when he returned to England asked his aunt if she knows Agnes is in love with someone and she said him that she thoughts that yes. David, with the heart broken went Agnes' home for ask it her directly as her "dear brother", and after a tender scene they declare their love the one to the other, and Agnes confess him what happened in Dora's room the day she died.

 After a few happy years we know they are married and they have some child, and one of them is called Dora and other girl is called Betsey Trotwood in honor of her aunt.