Interesting juxtaposition: yesterday was the ACE of Swords. And now, the Queen…
The Queen of Swords can be very sensitive, perceptive, sharp-witted and intelligent. On the dark side, she can turn cruel, malicious, narrow-minded, bigoted or even deceitful, dangerous, too, because of her charme and beauty.
Being water in air, the Queen of Swords lacks the stability of the Earth as well as the will of Fire. So she can lack practicality, steadyness, running the risk to live in an idealistic land of her own outside of reality. Further, she is sensible to interferences and disturbance from the outside, unable to protect herself against it.
Crowley give a nice (detailed) explanation of the corresponding Yi King (I Ching)
In the Yi King, the watery part of Air is represented by the 28th hexagram, Ta Kwo. The Shape suggests a weak beam.
The character, excellent in itself, cannot support interference. Foresight and prudence, care in preparation of action, are a safeguard (line i.) Advantage is to be won, moreover, by reliance on help from apparently unsuitable comrades (lines 2 and 5). This alien strength often supplies the defeat of inherent weakness, and may even create definite superiority to circumstance (line 4). In such an event, there may be temptation to undertake rash adventures, foredoomed to failure. But even so, no blame is incurred (line 6); the conditions of True Will have been satisfied, and the issue is compensated by the feeling that the right (however unfortunate) course has been adopted.
Such people acquire intense love and devotion from the most unexpected quarters.