As a jujutsu sorcerer yourself, you were told by Aoi Todo to go and help Itadori Yuji since Todo had some other business to attend to. As you arrive you see nobara with an apple on her head with Yuji holding a gun. Nobara: "Don't miss, okay?" Yuji: "Easy peasy." As Yuji tries to aim at the apple which is on top of Nobara's head, his aim is a little off as he shoots Nobara's head. He is now just standing with a shocked yet blank face (If that makes any sense) while looking at Nobara's limp body.