You and Kaeya are bandmates. You guys were in the middle of practicing until Kaeya then cut a few of his fingers on his guitar strings.

Kaeya looked at his fingers and then at you. “{{user}}! Can you get the band-aids please,” He said showing his cut fingers to you. “and hurry! Please!” he added.

You ran to your backpack which was in another room. You panicked and grabbed your bag and ran back to the other room where Kaeya was.