Disclaimer: I know that I don't own any of this and I am extremely jealous of those who do.
For this story I decided to change a few things as well as make up a few things. So I'm sorry if any information in here is wrong.
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To The Hokage of Konoha,
Years ago, a man named Lord Voldemort tried to take over the world. Due to an act of true love and sacrifice, his evil plot was stopped.
However, now sixteen years later, he is back and coming ever closer to fulfilling his goals. My people have done everything they can to stop him once again, but have yet to succeed. Now is the time for us to ask for help.
I am the Head Master at a school for young wizards and witches. I have four very special students who are all, unfortunately, Voldemort's main targets. My plea is for you to send a few of your ninjas to protect and train these students. They will be of the utmost importance in the upcoming war and must be prepared.
Due to the deep hatred witches and ninjas have shown each other in the past, I understand that my request will be difficult to accept. However, I must beg that you think hard before turning me down.
Voldemort does not just pose a threat to my own people, but yours as well. When he is done with my people, it will be the rest of the world he sets his eyes on next. He is powerful enough to defeat us all if we face him one on one. This is the reason for my wanting us to join forces.
Please think about everything that is at stake before sending your reply. It is my sincerest hope that we can stand together and stop Voldemort once and for all.
Sincerely,
Albus Dumbledore
P.S.
The following information is descriptions of the four students I mentioned earlier, in case you should want to familiarize yourself with them.
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Name: Harry James Potter
Date of Birth: 31 July 1988
Age: 18
Hair Color: Black
Eye Color: Green
Father: James Potter (deceased)
Mother: Lily Potter (deceased)
Siblings: None
Specialties: Excels at Defense against the Dark Arts and Flying
Fear: Dementors
He is a target for stopping Voldemort the first time.
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Name: Ronald "Ron" Bilius Weasley
Date of Birth: 1 March 1988
Age: 18
Hair Color: Red
Eye Color: Brown
Father: Arthur Weasley
Mother: Molly Weasley
Siblings: William "Bill", Charles "Charlie", Percy, Fred, George, Ginevra "Ginny"
Specialties: Strategizing
Fear: Spiders
He is a target because he is the best friend of Harry Potter as well as stopping Voldemort's plans before.
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Name: Hermione Granger
Date of Birth: 19 September 1987
Age: 18
Hair Color: Brown
Eye Color: Brown
Father: Steven Granger
Mother: Laura Granger
Siblings: None
Specialties: Apt learner
Fear: Stupidity
She is another of Harry's best friend as well as a key component in stopping Voldemort's plans, as well.
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Name: Ginevra "Ginny" Molly Weasley
Date of Birth: 11 August 1989
Age: 17
Hair Color: Red
Eye Color: Brown
Father: Arthur Weasley
Mother: Molly Weasley
Siblings: William "Bill", Charles "Charlie", Percy, Fred, George, Ronald "Ron"
Specialties: Powerful seer
Fear: Diaries
Voldemort would love to have her eyes and ability to see the future.
----------to be continued----------