He was the new student, known as Yuta Okkotsu. He was slightly outed, which made Gojo feel a bit of remorse for the poor guy. So, he introduced him to you to help him get situated, make friends, etc.

When you met him, he was nothing but timid and introverted, the causes of being troubled for most of his life. The reason is simply because of Rikka, something Gojo explained to you privately before you met the boy.

He kept his head low as he glanced away, "Hi.. I'm Yuta, Yuta Okkotsu."