I don’t know the rules of Miraculous at all outside of what
I’ve gathered from tumblr, so maybe this is illegal in canon but
I’m highly entertained by the idea that like, the class
takes a trip to somewhere high-security that requires passing through a metal
detector. So they tell the kids that all jewelry needs to be removed. Which is
like, cue small amount of panic from Adrien/Marinette as they remove their ring
and earrings. Some other patrons see their anxiousness and assume it must be
because those earrings/ring are highly valuable.
And this includes the akumized person in line who’s here to
rob the place.
Kids head inside. Akumized person overpowers the guard,
grabs the jewelry basket, rushes inside to steal whatever else. In their hurry,
Adrien’s ring drops out of the basket.
Marinette notices the person first. Hands shoot to her ears, but
nothing’s there. So she races back to the security desk to retrieve her
earrings. Lo and behold, they’re not there. There’s only a dropped ring on the
floor and…Chat Noir’s miraculous? Plagg sees her, and all rules-of-hiding be
damned pretty much tells her “Yeah I have no idea where Chat is. And that
person in there is akumized. And you already seem to be aware of this so just
put on this ring I’ll walk you through what’s about to happen.”
Very confused, she puts the ring on her finger. And (to
Plagg’s confusion now) Marinette activates it entirely on her own, and becomes
Mari-chat Noir (this is weird). But there’s not much time to think about
it. Plagg just gives her the speed-course in Chat’s powers and she rushes back
inside to fight.
The fight, of course, gets Adrien’s attention. Who now sees
the rather clumsy battle between akumized person and “Hey that’s not me”!Chat
Noir. Mari-chat Noir lands a kick on the person, which sends the jewelry basket
flying. People start running from the scene. The basket lands next to Adrien. He
drops to his knees and starts sifting through it frantically for his ring. It’s
not there. What is there is Ladybug’s
miraculous.
Tiki’s response is more or less. “You have to go help
Ladybug up there. Are your ears pierced? Never mind. Just take these earrings
and clip them to your shirt I’ll walk you through what to do.” So
Adrien does, and (to Tiki’s surprise) he knows how to activate the earrings, and becomes
Adri-bug.
Adrien joins the fight. The first 30 seconds are taken up by
mutual “Hey that’s my miraculous!”/”Where did you get that?”/”If you’re Ladybug, and I’m Ladybug, then who’s flying the plane?” exchanges. But
hell, at least they’re used to working together. Except now they have to coordinate
by giving each other commands for the best Ladybug/Chat Noir technique, now as
Adri-bug and Mari-chat Noir, to use in this situation.
The students watching the fight are downright baffled
because it’s definitely Ladybug and
Chat Noir up there. Except…Ladybug is Chat Noir. And Chat is Ladybug. And
describing the fight becomes downright impossible because it boils down to, “Then
Ladybug whacked the guy in the face. Well I mean it was Chat Noir. But Chat
Noir was Ladybug. Okay I mean Chat Noir the person
was Ladybug the superhero and he whacked
the guy in the face. No wait, let me rephrase.”
After the fight’s over, both of them agree to shut their
eyes, remove the jewelry, and drop the earrings/ring back into each other’s
hands, and turn away. It wouldnt be right to out each other over this. Both Tiki and Plagg go home with their proper owner. And
both of them are quiet in the realization of what happened. Because yes, that
was both Ladybug and Chat Noir fighting just now, and both Tiki and Plagg know
exactly which classmate they flagged down to take on the opposite miraculous role.