"So… I was wondering… can I invite a friend over for a week or two?" asked Leo nervously.
Lucius raised one elegant eyebrow. "You have someone you want to invite?"
"Yes. I'm not completely anti-social, you know. I just have high standards."
"Who is it?"
"Marisa. And she's not a Muggle-born, before you say anything. She was pretending to be one to mess with everyone. She does that kind of thing."
"Really?" asked Narcissa. "Tell me more about her."
"She's smart – her grades are almost as good as mine. She's… kind of evil, but in a good way, if that makes sense. She manipulates and flatters everyone to get them to like her, and if anyone does something she doesn't like she'll hit them back, with pranks or something like that. She's also a bit jinx-happy. She's kind of the only person I've ever met who thinks in the same way I do."
"In other words, she's a madwoman," concluded Draco. "But once you get used to her, she's actually all right."
"As long as you watch your back," Leo added.
"And she's really pretty," said Draco.
"I don't notice those things."
Narcissa looked at Leo as if she knew exactly what was going on between him and Marisa.
"I'd like to meet her for myself," said Lucius. "Yes, you may invite her. Will next Monday do?"
Leo nodded. "Yes, thank you."
He managed to avoid seeming stupidly happy at Lucius's approval as he left to send an owl to Marisa.