Shakugan no Shana/Fridge

Fridge Logic

 * If any evidence that you ever existed is deleted when your existence is devoured, what happens to any children you may have had?
 * They stay, but lose all their memories about you. Except when someone takes your place like Shana does once, which seems a good way to easily get a family.

Fridge Brilliance

 * During Yuji's fight against Shana, he reveals the nature of "Silver" to Margery Daw to stop her from breaking through his barrier. At first it appears as a generic Kick the Dog Break the Haughty moment, but when you think about it, she would've found about "Silver" later anyway, and her contract would've ended then because she would've been devoid of purpose; that way, she can continue without pursuing Silver. Granted, he still did Kick the Dog, and break her he did, but it wasn't really the worst thing he could've done, which reveals the high probability that Snake of the Festival isn't as bad as he appears.