Perciver oneshot

"Just as he turned a corner he saw him. Percy stood next to one of the twins, both firing spell after spell at deatheaters.

But then the wall was crumbling down and Percy was shoving his brother out of the way and Oliver couldn't move. He couldn't move and he hated himself for it."

Or a Perciver one shot that takes place during the battle of Hogwarts. Yes there is a happy ending and if I don't say the names of those who did die but aren't in this story they we can all pretend that they are alive.