Dear Sarada,
By now you must be around 9 years old. I'm sure your mother has raised you well these past years. I wish from the deepest parts of my heart to be there with you every day as well. Unfortunately, I can't. Life doesn't always give us what we want, Sarada. But life is good, you'll learn many things as you grow older.
About a year after you were born, I had to take off on a mission in order to keep the village safe. More importantly, I had to keep you safe. You were too young to remember something like that, but your mother and I knew we had no choice. There are sacrifices that we as shinobi must take.
I knew from the moment you were born that there would be many times I wouldn't be around. Although you were just a newborn, I told you this.
I told you I would understand if you grew to hate me for my absences, didn't trust that my feelings towards you and your mother were true. I wouldn't blame you to resent me. Regardless, I knew I would do anything in my power to keep you safe.
I hope to be home as soon as I can, though it still may be a couple years.
Until then, I hope you keep me in your heart, as you are always in mine.
All my love,
Papa