Regret

Possible alignment to The Moon

Card number eight in the deck.

A lesser Lord or perhaps huntsman in simple yet well honed attire grasp his chin in contemplative thought.

Although called "Regret" the card might not be as negative as it sounds. The gentleman pictured is clearly in retrospective thought which is often clouded by regret but perhaps as the old saying goes "hindsight is 20/20".
The handsome cavalier is contemplating what went wrong . In any position ascending the card is a good indication that time must be taken for retrospective analysis .

In the inverted aspect the card might be more indicative of true regret and show the lack of ones ability to learn from previous mistakes.