The Boy Who Boomed:
Vernon Dursley was a well-respected man; he had a lovely wife, a good son and had taken in his orphaned nephew and made a find outstanding citizen of him. The only down side was the rogue of a godfather of one Harry Potter Sirius Black. Well, if he had not been a lord his behavior would not be tolerated. He was one of the old blood, had worse manners than a vagrant, was crass and rolled around like a common worker in brawls and the like whenever he pleased.
Yet it was Sirius Black who had turned Vernon around, after the Potters for one reason or another believed that Harry was a squib and sent him away, Sirius had been there for him. Petunia had wanted to hate Harry on site, and both were not fond of magic, but Sirius had managed to worm his way into their lives and be the crazy uncle so to speak. This proved helpful when it was found out death eaters were still out there and Vernon had a vast knowledge of explosives and such.
Now it must be said the Potters were not bad people, when Wormtail was caught soon after they left Harry with his aunt and uncle, they had wanted to take him back. However, the death eaters wanted to continue the war and the Potters ended up dead with their eldest son in the care of the Longbottoms who did not know about little Harry not being a squib. Sirius, fearing for Harry did not tell them Harry was magical and let them continue with raising little Charlus. This is where the story really gets going eleven years later. With a healthy strong Vernon, a scrawny but healthy Harry and explosives in a warehouse.
"Now are you ready to show these death eaters who is in charge?" Vernon said chuckling at his own joke.
"Yes uncle." A thirteen year old Harry said, "but is this not murder?"
"Good lad, good morals." Sirius Black said walking up, "but no, it is war, and they are here and think you are there inside, the charges are set."
"Very well, and I get to see the warehouse go up?" Harry said.
"Sort off, fireworks place, not well protected, but we shall have fun." Vernon said, "now my lad!"
Harry pressed a button and charges went off as did fireworks. He grinned as he got to see the building lit up with all sorts of pretty colors. He turned to hi five Sirius and knew that no death eaters would escape this time. Served them right for not allowing him to be with his dear brother who was a bit boring. He wanted to study all the time while Harry was Gryffindor through and through. Now at fourteen Harry was very happy indeed to be able to finally put the hurt on twenty death eaters and thirty werewolves under Greyback.
"Wow, that is a novel approach." Rose said walking up to watch what was going on.
"Now this is my sort of world!" AK said joining her, but not for long as she vanished him only to get him coming back in a few short seconds, "I want to watch."
"Who are you?" Sirius asked Rose.
"Rose, female version of Harry, a light minded version, that is AK and he really should not be here."
"I took care of Voldy." AK said, "He went boom."
"Oh wow, I kinda wanted to see that." Harry said.
"This is your fault." Rose said to Sirius who shrugged. "Really it is."
"I don't attack those who do not deserve it." Harry said, "and really, I would rather not kill, but the explosions are fun. I am going to go into demolition after Hogwarts, taking down unwanted buildings, that sort of thing."
" I see." Rose said watching the last of the fireworks fizz out.
She decided to explore this world and found it was much different from many wrong-boy-who-lived worlds. Charlus was two years older than Harry was and he was a strong smart boy with lots of friends. He was light-minded but very boring; he was Ravenclaw and preferred books over any adventure and was relieved when it was found he was not the-boy-who-lived. However, he felt for Harry and offered to be his wand arm and protect his little brother. That was not fully needed now as Voldemort was very much a pile of ash and Harry was having fun rounding up the last death eaters.
There was one problem; the ministry was going to prosecute anyone who went after Voldemort or the death eaters with murder. However Rose knew how to stop that and with a short very respectful visit she had a license for everyone involved in ridding the world of dark and evil. Which was why, when the minister found out about what happened he came to arrest Harry at Hogwarts. He was standing talking to Dumbledore when a Fudge with his very pink (and hated) undersecretary came in with several Aurors to arrest Harry and everyone with him.
"Harry Potter you are under arrest for murder and using magic in front of muggles." Fudge said.
"No sir I am not." Harry replied walking up to hand over the paper that gave him a license to kill, "her majesty gave me rights you see."
"See here boy, we do not answer to a muggle!" Umbridge said.
"Well ah we do, you see." Fudge stammered looking over the paper, "yes all in order, very well, and Umbridge you are fired. Carry on then Mr. Potter."
Rose saw there was really not much for her to do here, but she did stay a few weeks to see that AK did not do anything to corrupt this Harry. She did not need to worry, Harry loved his explosives but he was not going to harm innocent people. She got to see Charlus, a red headed boy with glasses that looked like James Potter with red hair. Harry looked like his mother with black hair, much as Rose did.
The neighbors in Privet Drive were happy to see a healthy not terribly normal family in the Dursleys. Yes they were very middle class, had a nephew who had a godfather who was a rogue but they were as ordinary as any family could be. If only they knew the truth.