I'm Wiccan and do regularly use the tarot for possible clues on the way my near future may be moving. That was nothing like any interpretation of the Queen of Swords that I know, and I've been Wiccan for 27 years. Sorry, but no dice

In correct tarot meaning the Queen of Swords symbolizes someone who understands sadness of loss. A woman who has suffered a lot of pain but survived. Now that sounds like Sakura. If you want to use tarot meanings. (reversed meaning is a narrow minded person with rigid opinions who is too focused on unimportant things.)
The Ace of Swords symbolizes great determination and success. (reversed it's failure, humiliation, self-destructiveness, and creating your own obstacles)
The King of Swords symbolizes a man who is connected law enforcement, government or business management and knowledgeable in that subject. (Reversed it's a highly intelligent man who is full of evil intent and cruelty.)
The Knight (Knight in Tarot=Jack in playing cards.) of Swords symbolizes an action orientated person, full of energy and exuberance. (hmm that doesn't sound much like Kakashi... the reverse doesn't either- someone who is indiscreet and impulsive)
The Minor Arcana in Tarot have a King, Queen, Knight and Page court cards, then Ace (which is only the number 1 in Tarot,) through 10 cards. King and Queen are used to signify adult men and women in Tarot, Knight is a young man, Page is usually for a young woman, or a young child of either gender. (which is why the page looks so androgynous in tarot).
And the person who said the spade suites is the typical one used when showing playing cards images in ads is correct I don't know why though. Spades tend to be associated with pain, death and loss... Oh, and having bought official anime tie in playing cards the same characters usually appear on all the suites. In other words Sakura will also be Queen of Hearts, Diamonds and Clubs... Sometimes they vary the pose of the character on the suits, sometimes it's the same image across the suits.
Tarot Suits and their playing somewhat comparable card suits- Swords- Spades, Wands-Clubs, Cups- Hearts, Pentacles- Diamonds. Then in tarot you also have the Major Arcana that use persons or things in even more symbolic ways. There are 78 cards in tarot, 52 in playing cards.
There's a lot of different explanations for Tarot that why i said just coincidence