Dear (Y/N),
My name is Levvy. I am the sister of Levi Ackerman. I'm going to explain basic things about myself.
GOAL IN LIFE:
To protect my brother {LEVI} until death. Even though I am much younger than him, I will always have his back.
WISH:
To live a life of freedom and prosperity. I do not want to live in fear of death.
AGE:
17
APPEARANCE:
Just like my brother.
BIRTHDAY:
October 15
FAMILY:
Levi Ackerman
PERSONALITY:
A very... strange one. My moods switch easily, so I could be happy in one moment, and angry in the next.
BATTLE SKILLS:
Swift with the gear, and I always get a clean cut. But sometimes I can get a bit arrogant... and that arrogance may be the death of me.
HOBBIES:
Training, reading, and annoying my brother... I am very skilled at each.

I'm not much of a conversationalist. 
Sincerely,
Levvy Ackerman of the Survey Corps