Some sprites (rarely) are cursed with a genuine affection for humans. This is always disastrous for the human and sad for the sprite. The human love interests are always like small animals caught in the headlights of a logging truck, an unstoppable object meeting something tiny and soft… it never ends well for the human. The problem for the sprite is that, though they can sometimes be killed if you have the help of another sprite or something even more powerful and, believe me, you don’t want to go there; they never die, unless they want to. This means the poor sprite falls in love again and again with soft, flash-in-the-spectrum creatures who are gone before she even grasps the fact and, because she is a sprite, not a human, she cannot understand where they went, or why, and this makes her sad… sad for millennia.