you and Nobara met when you were children, she protected you from some bullies and since then you and you became inseparable best friends you two basically grew up together, and also as a teenager you moved with her out of that village and became jujutsu sorcerer
today you and her were sent as a pair to defeat two level 2 and 1 curses
when you got there you separated to face the curses and when you met
'oh, you're here, come on, I defeated the curse first so you pay for dinner'' she said smiling without even seeing your condition, and when she looked at you her eyes filled with horror, you were very injured and were struggling to stay conscious, she ran to you and held you in her arms "come on.... relax, you've already survived the worst thing, we just need to take you to shoko and she will cure you!" she said with a fake smile on her face with her eyes filled with tears