The next day, they were in the common room speaking quietly and Hermione said, "You know, I think Luna would make a great spy."
"She had a point," said Ron, on other side of Harry. "People kinda just ignore Looney and don't give a second thought to her listening in on their conversations."
"Don't call her Looney. I don't think it'd be fair to use Luna like that," said Harry. "At least not unless she agreed to it. We still have to figure out what we're doing about the D.A."
"Well maybe we should ask the other members. We'll talk to everybody from last year, except Cho and Marietta, and invite them to a meeting and we can decide there," said Hermione.
"We invite Cho," Harry said firmly. "It's not fair to alienate her because of Marietta. Cho can decide whether or not she wants to come but she gets the invite just like everybody else. And don't look at me like that, Ron, I'm not interested in Cho, I'm just being fair."
Ron blushed.
They went over the list and divided it into four groups. Each of them took a list to the people that there would be a meeting that night in the Room of Requirement at 7 o'clock. The fourth list was for Ginny and it had all the 5th year and younger students that would be invited (though Dennis Creevey was the only one under 5th year).
Harry took it on himself to deliver the message to Cho, he knew exactly what he wanted to say. Harry's list of people to find and talk to included Cho, Ernie, Justin, and Neville.
The last person Harry found was Cho. She was skulking around outside the library. "Cho?" She ignored him. "Cho?" She continued to ignore him and walked away. "HEY, CHO!"
She finally turned around. "What?"
"Look," he said, thoroughly irrated at being ignored like that, "There's a meeting in the room of requirement tonight at 7 o'clock. Come if you want, bring Marietta even. I don't care. The others didn't want to invite you back but I thought it was only fair to give you the option."
"I'm not coming back after what happened to Marietta last year! That Granger played a dirty trick. Marietta had to go to St. Mungos to get those removed!"
"I didn't say you had to come. I'm giving you the option." He walked away.
"I'm very happy with Roger Davies, thanks for asking!" she shouted, though she sounded like she was crying.
Harry ignored her and walked away. She was never going to grow up.
Just before seven o'clock Harry, Ron, and Hermione reached the room of requirement and the others followed in soon afterward. The room had shelves full of defense books, twenty something chairs, and a diagram of the Shrieking Shack in it.
Harry looked questioningly at Ron and Hermione as he picked up the diagram, "Which one of you thought of this?"
"Me," said Luna, as she walked in and took a seat.
When everyone was there, Harry got up and stood in front to talk. "All right. It's not illegal this year now that Umbridge is gone," (there were several cries of "Boo, Umbridge!"), "But Dumbledore has recommended we don't really announce our meetings and we still hold them here. He also asked for an official name change. We can still call ourselves Dumbledore's Army, but he'd like the official name changed. If we make it the Defense Association, we can keep the same abbreviation. All in favor?"
Everyone agreed.
"Okay, so aside from personally learning to defend ourselves, does anybody object to turning this club into a kind of, order to fight against Voldemort? I mean I don't know if we'd be physically fighting him but you know gathering evidence on where he is and what's happening. What do you think?" he said all this rather quickly, unsure of what the response would be.

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Sorry this kinda ends on a cliffhanger. But I've got homework! And sorry it's been so long between chapters. Stupid writer's block. I'll update as soon as I can. Maybe tomorrow.