Ziyad

What might work better for you is to ask someone to help you to develop the character. After you've researched for quite a bit who or what the character is by reading the script multiple times, sit on a chair in front of your helping hand. Ask that person to keep asking you questions. Best questions are simple ones like "How old are you. Are your parents alive. What are their names. Where did you grow up. Do you have a boyfriend". When exploring a character it might be hard to answer "What are your views on the israeli pakistani conflict?", but hey whatever works.

Then as you get these questions, you don't just answer them, but you'll answer them in character. Answer as your character would and don't answer if your character wouldn't.

I find that doing this for 5 to 10 minutes really helps me to slip into a character's skin more than writing any bio would, while still exploring the background of the character.