During the first war against Voldemort, it was prophesied that a child with the power to defeat him would be born at the end of July, to parents who had defied the Dark Lord three times already.
Two children who fit that criteria were born, and Voldemort chose to target one of them.
Neville Longbottom was the other one.
So, while James and Lilly Potter were killed and Harry Potter became the Boy Who Lived, Frank and Alice Longbottom were tortured into insanity by Death Eaters shortly after Voldemort's fall, and Neville was raised by a loving but stern grandmother who never let him forget that his parents were heroes and martyrs, which can really do a number on an insecure, introverted boy's psyche. For most of his life, Neville's been sure he could never live up to his parents' example, and not sure he wants to, considering where it got them.
Then, when Neville was fourteen, the Dark Lord returned.
There's only one Boy Who Lived, but if Harry's going to succeed, he's going to need help, and Neville Longbottom is going to do his parents proud.
Even if they won't know it.
At seventeen, Neville's tall but somewhat awkward, with a face that still shows hints of former chubbiness, and dark hair that's either longish and messy or short and neat depending on how recently his gran's had a chance to drag him to a barber.
[Neville is from the Harry Potter books and belongs to J.K Rowling, who I am decidedly not. This is an RP journal from which no profit is being made.]