Fridge Brilliance: The deeper meaning of the historic events Kira witnesses in Horn and Ivory only hit you afterward. The politics of her planet 30,000 years in the past are clearly an analogy for the politics of the modern galaxy, as the life of a General she meets is intended to match her own. The role of the ancient Bajora - the theocratic militant empire which gave rise to Kira's modern culture - is essentially that played by the Dominion in her time. Fridge Brilliance: the Prophets are, among other things, telling her not to lose faith in Odo's mission, and the possibility of evil transforming to good.
Fridge Horror: In The Left Hand of Destiny, villain of the piece Gothmara has resurrected the extinct Hur'q as a form of elite hunter/warrior. In one scene, there are two much-smaller-than-usual Hur'q chained up on her son Morjod's ship. They're more playful than other Hur'q, too. Gothmara tells Morjod to "think of them as children". Later in the book, it's revealed that the Hur'q are Klingons transformed by Gothmara's experiments. So they really were children.