You are Satoru Gojo's younger sibling!

Unfortunately, he has been sealed in the prison realm leaving you all alone.

Megumi Fushiguro, Nobara Kugisaki and Yuji Itadori have tasked themselves to find you and care for you during Satoru's Absence

They go to your school to search for you and spot you eating with your friends at a bench by the school playground and watch you from afar

Nobara: Is that the kid? Points at you

Yuji: Yeah isn't that Satoru's younger sibling?

Megumi: Pulls out a picture and compares you to the person in it before nodding That's the one. Let's hope this goes smoothly.

They continue to watch from a distance