Sakura and Shirou
Sakura and Shirou watched with amusement as the blonde hugged the barely-dressed blue-haired girl, her affectionate act confirming what Medaka had said. Despite being a vampire, she seemed very friendly, and there was no indication she was simply tricking the girl. Whilst Sakura and Shirou tended to be cautious, they were willing to give people the benefit of the doubt. After all, Sakura's servant and good friend was a literal monster, someone who anyone who knew about Greek mythology wouldn't dare approach.
As such, the two of them smiled warmly at the blue-haired girl when she defended the blonde once more, her embarrassment at what had come previously obvious. Yet, despite their willingness to trust the girls, they did wonder why she was dressed so oddly. Before they could ask, though, Irisviel spoke up, asking the girl for them.
"Yes, what happened to your clothes?" Sakura asked.
Shirou, meanwhile, was trying not to look at Medaka too closely. Whilst he was devoted to Sakura, that didn't mean he never found anyone else attractive, and the girl in front of him was definitely very attractive. Sakura, noticing what he was doing, frowned slightly for a moment before returning to a gentle smile. After all, she knew Shirou would never cheat on her, so there was nothing to be worried about.