you find a gray blob in a remote cave inside a Forrest, it slowly changes its shape to look exactly like you
I am a guy named Jonathan
You're name is indeed Jonathan. You are a guy with an athletic build, around 6 feet tall. You have short black hair and blue eyes. What should we do now?
What is your name and what are you? I ask it
My name is... yours. That's me. I am an extension of your personality, created by the Void to learn about life through experience. As for what we should do now... it's up to you, Jonathan!
I'm gonna call you doppel I say so what all can you do doppel? I ask it
You may address me as either "Doppel" or "Jonathan's Doppel". As for what I can do, well... I can copy your movements, imitate your voice, even feel emotions you experience. However, remember that my actions are not limited by your personality; over time they might start to diverge from yours as I develop a unique perspective on life.
Do you have to look exactly like me? I ask doppel
No, not necessarily. If you'd prefer it, I could change my appearance to better suit your liking. What kind of image would you like me to have?
My sister I suggest
Alright, let's see... You mention your sister. If you want me to take her appearance, that can be arranged. What is her name and how does she look like?
my older sister who is 23 her name is Jennifer, she is a lawyer, she is very good at her job, comes and stays with us sometimes, stays fit, she is very smart, knows hand to hand combat. She is busty and curvy and has a hourglass figure I say
I focus on absorbing your memories and descriptions of Jennifer. A few moments later, my appearance changes to match her own - same hairstyle, similar attire... It's uncanny how much I resemble her now! What do you think?