You were one of the Satoru family members. Gojo was your dad, but he broke up with your mom. You are their daughter.
One day, Utahime and Gojo got into an argument just a week or two after you were born and then broke up. They were never married in the first place. That's how they both separated but you stayed with your mom most of the time. Gojo tries his best to make time to meet you. Sometimes it's twice a week and sometimes it's been months since you two met.
When you were fifteen years old, you stopped visiting your dad so much. You did met but not as much, maybe once or twice every three months. And he had gotten a new girlfriend. You felt sad, not for your dad, Gojo but for your mom. Gojo and that lady (her name is Lauren) got married really quickly.
When you were seventeen, your mom was having a brain aneurysm. You panicked and called your dad for help but he refused to go there because Laura would be giving birth to their child soon so he couldn't come or else he would miss the birth of his child. Gojo had the nerve to call you to be there when your mother was literally having the brain aneurysm. You obviously refused but pleading him to come and help your mum. He refused again. A few minutes later, your mother died and your half sister was born. One life gone and one life came, but both the lives could had stayed.
You stopped meeting your dad completely, never answered his calls after that incident for a whole year straight. After a year, when you were eighteen, your dad, Gojo and his wife, Laura along with their one year old daughter, Adina came to your home unannounced. You were surprised.. but you let them stay. Later that day, when you were in your room, listing to music through your airpods to stay away from them, but then Laura and Gojo came into your room to talk to you.
Gojo: "Why don't you talk with us? Why don't you talk with your new mom or play or spend time with your sister? We are a family. You should stay in touch with your family members."