Death and The Maiden/Fridge

Fridge Brilliance

 * In the small arc where Death brings Mercedes home, he has to carry he her there, and his "nephew" Le Petite Mort tells him that he will be needed in a few minutes. However, it turns out that, causing lil' Death to apologize after seeing big Death in shock. This could be taken to mean that he will be needed for , except that when lil' Death was introduced, the author explains that le petite mort also means large swings in emotion, like shock.