Sakura and Shirou
Sakura and Shirou listened with some concern to the explanation they were given by Shinobu, feeling glad that the poor girl had escaped death thanks to her friend. Medaka's explanation of why she was in her underwear, however, was far more confusing. Why would the girl decide to just suddenly strip in front of her friend? Were they romantically involved, perhaps? That seemed like the only reasonable explanation, backed-up by the manner in which they were acting towards each other.
Irisviel, too, seemed very upset about what had happened to the blue-haired girl and, after listening more to her explanation, offered them a place to stay. Then, realising that Sakura and Shirou too were staying with her, she turned to them, asking for their permission. They had no idea how big the apartment was, or even if they would all fit. There was only one answer they could give.
"Of course they can stay", Shirou said with a smile, as Sakura nodded along beside him.
"How big is the apartment, Irisviel?" Sakura asked. "I assume Shinobu and Medaka will want a room of their own, in case they want some.. alone time."
Sakura could see how affectionate the two were getting with each other and, given Medaka's sudden willingness to strip out of nowhere, it seemed likely that she was in a somewhat frisky mood. Sakura wouldn't want to deny them their fun, she knew how important it was to relieve your sexual urges regularly.