Here's the purrevious part:
Tikki: What do we do now?
Plagg: I can't stay out of the ring without a holder for too long. Someone has to use the ring. You can't fight alone.
Marinette: Plagg.... I can't. I can't just give the ring to just anybody!
Tikki: I think the best thing to do now is....
???: Hey! Anybody here?
Tikki grabs Plagg and they both hide in Marinette's satchel (she changed her clothes before transforming earlier). Marinette turns to the stadium entrance to see someone coming towards her.
The clouds uncover the moon.
Marinette's heart skipped a beat. For a moment, she thought that Chat Noir was there, running towards her from across the stadium. But instead, she saw Marilyn (who was still dressed as Chat Noir). Marinette was half sad and half relieved. She stood up and faced Marilyn, hastily wiping her tears away.
Marilyn: Marinette? Hey... why are you crying? What happened?
Marinette: He's gone.... *bows head* Chat Noir... he.... fell into that cauldron! *points to the acidic cauldron*
Marilyn: *gasps, runs to cauldron* He fell in... here??
Marinette: *nods, tears up again*
Marilyn: B... but.... h-how??? *tears form* Where's Ladybug??
Marinette: She failed. She lost. She couldn't save Chat Noir. *crying softly*
Marilyn: Chat Noir...... *tears flow* no........
Marilyn: Does anyone else know?
Marilyn: We have to find Ladybug. She can fix this. I've heard of her adventures and how she saves Paris. She can fix this. I just know she can. C'mon, let's go.
Marilyn places a hand on Marinette's shoulder and looks into her eyes. Marilyn was older and taller that Marinette. It reminded Marinette of Chat Noir. Marilyn had a very similar physical resemblence to Chat. Then, an idea hit Marinette. It was crazy, but it was a chance she was willing to take.
Marinette: Do you know what Miraculouses are?
Marilyn: They're the magical pieces of jewellery that give Ladybug and Chat Noir their powers, right?
Marinette: Yes. Now listen. I have an idea. But you can't tell anyone about what I'm about to show you now. Not even your closest friends can know. Promise me you won't say anything to anyone.
Marilyn: I understand. I promise I won't tell a soul.
Marinette: You guys can come out now...
Tikki and Plagg both fly out, startling Marilyn a little bit. Tikki floats forward to speak to Marilyn.
Tikki: Hello, Marilyn. I am Tikki. And I am a kwami. More specifically, I'm Ladybug's kwami. I help her transform and give her the power of the earrings.
Plagg: Hi, I'm Plagg. And like Tikki, I am also a kwami. I am... I mean, was..... Chat Noir's kwami. And I give him the powers of his ring.
Marilyn: Wait... that means.... *gasp* You're..
you're... *whispers to Marinette* Ladybug?
Marinette: *nods* And I need a Chat Noir to help me defeat Hawk Moth.
Marilyn: Uhh.. about that.... Hawk Moth akumatized more than half of Paris. He tried akumatizing me, but I smacked the butterfly-thingy and ran here. I saw you, I mean, Ladybug come in here and thought I'd get you to come.
Marilyn: Yeah... I tried calming people down, but they just shot stuff at me.
Marinette: This is more urgent than I thought. *sigh* Take the ring. *extends ring to Marilyn* Please. Chat would have wanted you to have it. At least temporarily.
Marilyn: I.... I......... okay. But only temporarily. But I won't be Chat Noir. I won't use that name. I will be referred to as Chaton Noir, if that's okay. I'll never replace him. Never.
Marinette: Thank you. I'm glad you understand. He would have appreciated the respect.
Plagg: Just say 'Plagg, Claws Out' to transform.
Marilyn: Are you sure about this, Marinette? I mean, isn't there some rules or anything?
Marinette: Trust me, please transform. Fight on his behalf, please.
Marilyn: Okay... Plagg, Claws out!
Marinette: Tikki, Spots on!
And a moment later, two figures leaped out of the stadium, seemingly touching the moon as they jumped.
Please don't feel bad about the whole Chaton Noir thing, guys. There's something really big up ahead and you'll find out soon enough why I'm temporarily holding the ring. Don't feel bad, I'm not trying to be rude or insult anyone. Everyone in the fanfic will have their moment to shine, so please trust me and stay paw-sitive! And thanks for reading!