White Fear

Improvise

Cat Blanc will show a little bit of good side but he's still a villain. Let's say that his timeline caused him pain, loneliness, and insanity. I've seen how that's like for those who get bullied, abused, or neglected, they become twisted with madness.

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Cat Blanc now lives in an abandoned apartment building with his white cat with blue eyes like his. He wanted to cause chaos in this world but Cat Noir came into his mind because he reminds himself of those heroic deeds he did with his own lady but those days are long gone. His alternate timeline has been erased but Marinette and Ladybug being the only person who remembers him brought him to life from her mind.

"Don't worry my sweet." He pets his cat as it purred, "This bad cat is gonna spook his prey like a ghost" He winked and goes out the window.

He smells Marinette's scent that leads him to the Grand Hotel and he jumped to the balcony. He was surprised that the window is unlocked and he sees Cat Noir guarding his princess. He opened the window but his counterpart heard him and was about to scratch him when he caught his wrist.

"Shhh.....we don't want to wake her up, brother. It would be a shame to get all bloody again" Blanc chuckled evilly.

"Why are you here?" Cat Noir asked and lets him in but protects Marinette who is sleeping.

"Since you're so good at protecting her, make sure she doesn't get hurt or worse, die. If she dies, I die too. Why? Because I came from her dream world." Blanc explains it to him.

"Why are you turning anti?" Cat Noir asked.

"Hmph, I'm still a villain, Noir. I am you but the opposite of nice. After all, I did make your pathetic daddy not to be strict with you." Blanc grinned.

"Yeah, thanks. But she needs to be away from you" Noir said.

"Yeah, I knew that. Even if she no longer fears me, I go back to her dream world in her mind." Blanc explained.

"Despite that, you'll be locked in her mind," Noir said.

Blanc pulled him outside to the balcony so that Marinette doesn't wake up, "When you put it that way, yes. Just like your fear of evil Ladybug too"

"Yes, I've fought the senti-version as well," Noir said.

"Yeah, and later died by getting released from existence," Blanc said.

"And Adrien, you have to stand up to people. You gotta stop letting nasty people tell you what to do. Especially from your father. In my alternate timeline, our father tried to threaten the love of my life by forcing her to break up with me." Blanc gripped the rails of the balcony.

"Did he?!" Noir gasped.

"Yes, it was when I felt used by him than being his kid," Blanc said, scratching the rail.

"No, my father would never do that!" Noir refused to believe that.

"He did. Think about it. He threatened your best friend Nino once. Remember how desperate your best pal was who wanted to throw a birthday party for you?" Blanc reminded him.

Noir paused and thought about it for a moment, then it clicked, "You're right!"

"Exactly. And what happened to Nino?" Blanc knows the answer to that.

"He got akumatized into Bubbler," Noir said.

"Exactly" Blanc nodded.

"And our birthday became a disaster" He added.