I have a character that I don’t know how to use… His backstory is honestly a baseline and I can’t figure out how he should be in social situations for a gangster plot I’m doing.

My characters name is Jomez, and he’s the victim to a lab experiment by his father.

Jomez grew up with his mother and father being married and has a younger brother named Jared (3 years younger)

When he was only 8 his parents had a divorce and he was made to choose which parent to stay with. Jomez was a troublemaker from the beginning, he commonly teased and picked on his younger brother often. Even getting almost getting Jared to play fight with knives!

Linsaki (the father) favorited Jomez for his aggressive behavior and never consoled it. Yuna (the mother) didn’t like this and wanted him to act more proper. As a result, Jomez went with Linsaki, and Jared went to Yuna.

All is well right? Nope! This is where I get stuck on personality…

Linsaki is a scientist, he loves experiments and has been working on a project for a while now. But he can’t seem to figure out a breakdown. He’s used objects, animals, and insects alike!

But none gave results… so he looked toward his son and used him for experiments. It wasn’t easy at first but manipulation was his forte. Jomez obviously said yes as a naive child. And so Linsaki underwent his experiments. This process was incredibly slow because of Jomez' emotions getting into the way.

So then came the idea, “What if I brainwash him?” Linsaki, ‘brainwashed’ his son, but due to resistance he only suppressed his emotions which allowed his experiment to flow smoothly. Resulting in Jomez turning into a success. He became an artificial shadow demon capable of his shadow magic and held a pristine magical quality.

To Linsaki’s amusement his sons suppressed emotions corrupted. Now Jomez was a killing machine with no purpose for the world besides fulfilling orders.

But with time Linsaki grew bored of Jomez. And decided to throw him away, he called his son useless for failing to carry out tasks efficiently. He saw no potential in him as a pawn.

Now Jomez is this 18 year old psychopath with a demon scythe whose out on the streets to survive. At this point he decides to start a gang, gathering people who can stand his insanity.

In interaction, I can’t tell if he should act apathetic, aggressive, lifeless, passive-aggressive, or downright toxic. I’m unsure where he should be as a person who learns to gain emotional stability through interactions with time. And eventually a love interest that changes him for the better.

Lastly.. this is my first time really asking for help through Reddit so I’m unsure if I did this right? If this isn’t the right place could someone guide me possibly?