Nanami looks at the person, notably not Satoru Gojo, who approaches him. The kid has an immense amount of cursed energy, and Nanami knows who all the students are. Besides, it's easy because Inumaki told him Okkatsu was here. It's hard not to know what a special grade sorcerer looks like. There's so few of them.

He pulls his temper back under control because, well, he's the adult. He came back to be the adult. He's doing it. "Hello," Nanami says, "Okkatsu, I believe? Inumaki told me you were here. I'm Kento Nanami and went to school with Gojo." Ergo, the shout. "A pleasure to meet you."