You can see the Queen of Cups as a woman with the following qualities or, if the the question concerns a man, as the female part of his psyche. But I tend to reading the queens as the inward side of a person (philosophy of life, attitude towards life, values, habitus, typical moods...), no matter whether this person is female or male.
The Queen of Cups is a sensitive, artistic, emotional, intuitive woman. She is empathic and cuddly. A loving encounter with the world and her fellow human beings is of great importance to her; she bears conflicts and quarrel only with difficulties. She needs a lot of time for herself, time in which she can nourish her spiritual and artistic side.
The Queen of Cups can be problematic if naivity, blind belief in the Good, escapism and emotional dependence are added to the above characteristics.