A dragon who is not really a dragon turns up in Celestia's bedroom. She calls herself Glory, Spirit of Righteous Warfare, and she might possibly know something about a Spirit of Chaos who is currently a piece of statuary that may make Celestia rethink her strategy. Is pretty much a pre-story to "Keep Calm and Flutter On". Also, yes, this a crossover, although not the kind where the main characters from one fandom meet the others, and Glory is not an OC, but it might be hard to figure out who she is given that in the canon she comes from, she's not a dragon and her appearance was small enough that I've had to invent a lot of her personality. Ten points to anyone who figures it out before the notes at the end.

A page for this series now exists: Next of Kin to Chaos