For Want Of A Nail: The opening of the chapter establishes the big divergence that makes the story possible: all of the Miraculous were created, but the Black Cat Miraculous and the Kwami of Destruction tied to it were stolen by its first user who would go onto use it for evil. That person died, the miraculous was stolen by a thief and Villainous Legacy would surround it over the years.
A pair of earrings and a single ring that were meant to be partners for all eternity, key word meant. Plagg could do nothing but stare in horror as his first user told him how he had betrayed the fledgling Order of the Guardians and was now on the run from them.
Nino accidentally does one when he trips Marinette when she tried walking up to him.
Morph Weapon: An object-based example. When Marinette puts on the miraculous, its inert form turns rose-colored (in contrast to canon!Adrien's ring being white/platinum) and conforms to fit her finger. This implies that the miraculous are capable of taking on different forms in reflexion of their wielders.
Slippery MacGuffin: In spite of the centuries the Cat Miraculous has been used for high-profile bad guys, the Order of the Guardians — which is an order of mystics and monks who are the arbiters of the Miraculous — have been unable to procure it because it always ends up stolen or lost or given to a different bad guy.
He followed his user from place to place till the man died and a thief took his miraculous. From their he was passed around from criminal to murder to deranged physco.
Woobie and Chloe her bully, Chloe takes the pastries Marinette made for the class and dumps it onto Marinette. When a teacher asked what happened, Chloe tells her that Marinette did it to herself, Kim "verifying" her story as a false-witness. During lunch, Chloe and Kim actively look for her just so Kim could take her lunch.
