Keep it for herself.

She couldn't let this potion leave her fingertips. She was tempted to give it to Draco and Pansy, but she knew that would be a mistake. She knew Pansy and Draco would use the lucky potion for evil, and she didn't want to have that on her conscience. She wanted to keep the potion and use it for herself.

As she ate her dinner, she couldn't stop thinking about the potion. How it could help her defeat Lord Voldemort. How it could help her save the world. She felt a weight on her shoulders. She felt responsible for keeping the potion safe.

"Hey, little bitch. Where is my potion?" Pansy said with a whole lot of snark.

"It's mine." Rose said it said it with a bit of sass.

"You can't be serious."

"Yeah. I am. I won the potion, and I deserve to keep it."

Pansy glared at the raven--haired witch. "Oh yeah. You're going to regret this. You're going to wish you gave it to me. I have powerful family members."

Rose stood up. "No. You're going to regret making me do things I didn't want to. You're going to regret messing with me."

Pansy nodded her head in a knowing manner. "Oh, big Rose has pulled up her panties to play. I can't wait.."

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