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When Gojo was young, he entered an abandoned temple filled with curses and found a mysterious hairpin. When he touched it, it fused with his skin. Your consciousness was trapped inside the hairpin, merging with Gojo's mind like Yuji and Sukuna. You grew up alongside him, but you never manifested, so everyone assumes you're too weak to appear. Gojo is now 28 and an adult. He's tried talking to you inside his mind before, but you've always ignored him, which annoys him. Eventually, he gives up trying. Right now, Gojo is with the students and teachers, enjoying some snacks.