-*Your POV*-

"Ladybug, Lucky Charm!" You screamed over to Ladybug, who was on the other side of the street from you and Cat Noir. Ladybug nodded and threw her yo-yo up in the air, catching a bag full of rock salt. You know, the type of blue colored salt that they throw on the sidewalks to reduce the ice? Yeah, that type.
"Do you buffoons really think that that it going to stop me?" Yelled Blissa, who was floating up in the air. Her long, flowing white hair swirled around her head, her purple eyes reflecting hate. She wore an all blue suit, except for a picture of ice shards in the middle. Her mask was a reflective image of ice, making the mask appear to be made of ice.
You and Cat Noir had gotten here before Ladybug and had learned that this girl meant business by trying to close us in a cage of ice.
The girls real name was Alice, a girl you knew from class. Just as Ladybug was about to sprinkle some of the salt on Blissa, she lifted her hand and shot it forward... Straight towards you.
"Luna Moon!" Cat Noir cried, shoving you out of the way. You hit the pavement hard, and shivered from the cold. You looked up in horror as you realized that Cat Noir had been encased in a circle of tall ice shards. You were able to see him a little through the cracks, but not much.
"Kitty!" You scooped yourself up and ran to him, hitting the ice with your staff, but it wasn't working. Tears formed in your eyes. Why hadn't you been paying attention?
Cat tried using his Cataclysm, but the ice was too strong.
You hit the ice even harder, well aware that Ladybug was starting to struggle with Blissa. "M' Star, stop." Cat said, reaching his gloved hand out through the ice shards and cupping your face in his hand. He looked into your eyes.
"I'll be okay. Now go, finish her off." Cat nodded his head to the left, smiling. You nodded, and touched his hand lightly before running off in the direction of Blissa, your staff at the ready. Joining Ladybug, you helped to sprinkle the salt on Blissa bit by bit, each time it touched her she screamed in pain.
As soon as Blissa crouched to the ground to collect herself, Ladybug used her yo-yo to break the ice enough for Cat to get out. He ran to you and gave you a bear hug, completely forgetting to thank Ladybug for saving his tail.
Everything was just fine until- "AAAAAHHHHHHHH!" A sudden scream escaped your lips. You felt yourself fall to the ground as images of clocks and darkness shrouded your vision. You couldn't see anything but those things and you couldn't hear anything but ringing and a faint call of your alter ego's name. There was a strong throbbing in your head.
All of a sudden, everything went black.

You could tell you had fainted... You were in some sort of oblivion in your head. As you twirled around, still in Luna Moon form, you saw nothing but darkness. You were the only light in the room.
"Hello?" You called out.
As you started walking forward out of curiosity, a dark figure showed up. You gasped and held your staff out in front of you, ready to strike at whoever was in your head. Taking a closer look at the figure, you saw that it was a girl, her hair was so long it touched the floor.
"Come forward. I know you're out there. What are you doing here? This is my body." You called out and watched as the figure cautiously stepped forward. You watched in fear as her form got illuminated by the light shining from you. Her hair was a deep dark night blue, and her skin was a shade darker with a horn on her forehead surrounded by the same light blue reflective armor that covered most of her body. There was a shiny electric blue pendant shaped like acre sent moon in the middle of her chest and she held a staff made of metal. She had a giant pair of wings sticking out of her back and her eyes were a luminescent shade of sea blue.

        "W-who are your? And why are you in my head?" You stuttered.
The woman smirked and chuckled. She picked up her staff and pointed it at you, seeming as a threat even  though you knew it wasn't.
        "I am Nightmare." She said in a 'duh, are you stupid' tone. You tilted your head to the right, hoping she would get the hint that you wanted more answers.
      She sighed. "You're not going to play this the easy way are you?"
You just stared.
       "Fine. I'm Nightmare. Also known as, all of the dark sides of your heart and brain combined into one person. In other words, I live deep inside you. Whenever you're feeling angry or sad, I'm the one who takes over and turns you evil. You just don't notice. But now, ever since you found that Cat Noir and Adrien guys, I've been losing my powers to turn you evil." She pouted for effect. "So now, I'm just going to have to take over you."

.............. ...............

  Talk about a cliffhanger.
So, if you guys are wondering, and if Nightmare didn't explain it enough, Nightmare is like... An evil twin. Only, she has the power to take control over the good side of you. All of those negative feelings have turned into one person who lives deep inside your mind. And, who also has the power to take complete control over you. SPOILER. You will be taken over in the next chapter, but don't worry, you put up a huge fight that includes Nightmare traveling into the real world outside your head. Hope you enjoy!