COMMENTS:

She can be thought of as the "flip side" of the King of Cups.

The box she's holding is reminiscent of the Biblical description of the Ark of the Covenant (Exodus 25:10ff).

The Queen of Cups is sometimes associated with the Goddess Kwan Yin.

Silver RavenWolf says that the Queen of Cups is "oft times 'the other woman' in an illicit affair."