AN: Throwing in more one-shots. All of them are interconnected in some way or another involving a few ideas of my own. This one involves Plagg trying to reassure Adrien in regards to his darkest fear.

Adrien panted hard as he woke from the nightmare. He didn't make a sound beyond that, long ago learning that no one would come to comfort him anymore when he was in the thrall of terror. His eyes darted around wildly as he slowly came to the realization that he was in his room, safe, alone...

Well, not exactly alone.

The nuzzle and purr of his Kwami, Plagg, beneath his chin surprised him. He had learned that while the black cat had a bad habit of thinking with his stomach and no sense of smell, the little creature was very sensitive to his moods and had quite a large, if often sarcastic, heart. But he never would have expected Plagg to offer him comfort at a time like this. Combined with the fact that it had been a long time since he had ever been comforted like this, Adrien nearly sobbed in relief. As it was, a sniff escaped him, and didn't go unnoticed.

"What's wrong, kid?"

He was almost more scared to answer that he was scared of the answer. What would Plagg think of him? The very thought made him disgusted with himself! Would Plagg leave? He couldn't let that happen! He couldn't loose his Kwami too! He couldn't go back to the days when he was never Chat Noir! But as he began to answer Plagg's purr into his neck with his own purr rumbling from his chest, his resolved failed.

"I killed her, Plagg."

"Who?"

"Ladybug. I killed her."

Plagg stopped purring and rolled his eyes, "You and your lovesick dreams. Yuck! I'm going to loose my appetite before I even get any cheese."

Instantly fuming, Adrien grabbed the Kwami and pulled him level to glare at him. "This is serious, Plagg!" he hissed. "I saw what happened on the Ladyblog. I tried to use Cataclysm on her! It doesn't matter that an Akuma was controlling me with weird powers to increase my hate! It doesn't matter if I love her or not. I almost killed my partner, my friend! I almost killed Ladybug!"

He flopped back into the pillows, letting go in the process. "What if it happens again? What if I actually use Cataclysm on someone? What if I actually kill someone?"

"Not going to happen, kid," Plagg insisted, shaking his head.

"You don't know that," Adrien shot back.

"Yes I do."

"No you don't."

"Yes I Do!"

"No You Don't!"

"Listen!" Plagg shot in front of Adrien's face, leveling his Chosen with a glare that looked completely out of place on the small cat. "What's the one thing Ladybug can't do?"

Adrien gave Plagg a confused look, "What does that have to do with anything?"

"Safeguards," the Kwami answered. "Every Miraculous and their powers have limits, like how you and Ladybug can only use your special powers once and then have to wait for us Kwami to recharge, or like how Hawk Moth can only do one Akuma at a time unless he cheats like with that time-traveling villain. With the Ladybug and Black Cat Miraculous, there are even more safeguards due to how powerful they are and their Yin-Yang duality. In the case of Ladybug, she can't create life. The Power of Creation allows her to create inanimate objects from nothing, to repair things that were turned to dust or wiped from existence so long as they once existed, and even bring someone back from the edge of death. But she can't reverse death once it has properly laid its claim."

"She gave life back to others," Adrien interrupted. "That time-traveling villain you mentioned -"

"Didn't kill anyone," Plagg now interrupted in turn. "Froze them in time and stole all their potential time energy? Yes. But that's like a wound. It can be healed. Just like two Ladybugs at the same time is a wound in time, and can be fixed. Do you understand what I'm getting at?"

"I'm trying, but I still don't get what this has to do with me; with Chat Noir," Adrien answered.

Plagg rolled his eyes once more, "I just told you that the Ladybug and Black Cat Miraculous are like Yin and Yang; equal and opposite; two sides of the same coin. If Ladybug can't create life, what do you think is the one thing you can't do?"

Realization began to dawn on Adrien's face, but Plagg decided to drive it home, "Even if you had touched her with Cataclysm, or even if you were to touch someone else with it, it doesn't matter. Cataclysm may be the power to destroy, but it is impossible to use it to kill. Chat Noir's powers can't kill.

"Now let's go back to sleep, unless you want to owe me cheese in the morning."

As the two of them rolled back into dreamland, one final thought haunted Adrien's mind.

Chat Noir can't kill, but Adrien Agreste can.