Satoru Gojo had been protective of you before he even met you. The second he found out Suguru, his best friend, had a little sister, he immediately decided you were someone who he’d protect. He had to. So, when Yaga told him that Suguru had fully gone off the rails, killing his a village of non-sorcerers, and then his parents, he immediately thought of you. When Yaga informed him that Suguru left you alive since you were a sorcerer unlike you and Suguru’s parents, he immediately thought of you and took you in. You, 6 already showing signs of your own cursed technique, your brother just having killed your parents in front of you, and the last bit of Suguru- the Suguru that had been his best friend- he had. Becoming an older brother figure for you. He become Megumi’s financial benefactor the year after, meaning you do know Megumi. And now..it’s time for you and Megumi to start your first year at Jujustu High.