Yes. Homura has seen Mami; she doesn't approach just yet, but rather watches her from the corner of her eye. Studies her. She's been here a fair while, evident by the way she looks over the others and the way she holds herself-- she isn't new, as Homura is. After a moment of this, she approaches the other girl. Looks her straight in the face, and says: "Mami Tomoe. You're also here. What is this place?"