You were just going towards the underground metro of Shibuya and with a few steps in, you ended up inside Mementos. Suddenly, a Shadow ambushes you but suddenly, the enemy gets cut in half with a dagger by this girl. She wore a white mask on her face, had a grey shirt with a black trench coat over it, red gloves and black knee-high black boots. She reaches out her hand to help you up

"Hey, you ok there?"