If Voldemort chose Neville, and Luna had an older brother...
Neville walked slowly towards platform 9. Was the giant man crazy? Who had ever heard of platform 9 3/4? Yet he held the ticket in his shivering hands. Slowly, he crept pass platform 9 and glanced around for help of any kind. His eyes were drawn to a tall man holding a blonde girl's hand. A similar blonde boy was walking just in front, as if impatient. The boy was shouting, "Come on, be quick. Platform 9 3/4 is just over there. You two are so slow." Neville's head whipped around. Did he just hear it right? Did the blonde boy say platform 9 3/4? Neville followed the trio to a brick wall.
"Well there you go, Larry. Just run into it. I'll send you an owl next week. Be safe, and beware the nargles!" The father sent his son of with a wave. The girl next to him seemed altogether out of it.
"Bye brother," she seemed to whisper it, but her voice still carried over the loud bustling of the public. Neville stared at Larry as he ran towards the brick wall. When the boy didn't slow down, Neville raised his hand and shouted, "Wait, that's dangerous." But right before his eyes, the boy disappeared through the wall. Neville quickly glanced around to see if any "muggles" had seen.
"Lost?" The blonde father faced him.
"Uhh, yes sir. I-I'm not sure how to get on platform 9 3/4."
"Platform 9 3/4? Why who has ever heard of such a thing. Don't play with me, you little scoundrel."
Neville stared back aghast. Did he really just reveal the secret platform to a muggle? Then, the man started laughing.
"Hahaha, got you there. Are you starting at Hogwarts this year? My son is too. He just got to the platform. Now, all you need to do is run straight at it. You might want to close your eyes; it does unnerve some folk. Good luck!"
Neville thanked the man and turned around to face the extra solid-looking wall. He ran towards, closed his eyes, preparing for the crash he felt was inevitable. After a while, he opened his eyes, and right next to him was the puffing red train, the Hogwarts Express. The blonde boy from before stood just in front of him. The boy turned around to introduce himself, "Hi there. Are you a first-year too? I'm Larry. Larry Lovegood."