Rider
Recognising that the two lovers were in the middle of a conversation and had barely even noticed her arrival, Rider opened up the box and took out a slice of pizza as she listened to their conversation. However, then, the conversation got onto the ribbon in Oka's hair, Rider's eyes widening momentarily as she heard the very-different explanation for it's presence, before she smiled gently.
"You're right to be proud. Not everyone can be a hero, after all", she said, smiling.
Then, she took a bite out of the pizza. To her surprise, the meat didn't seem to be beef, although it was something similar. It tasted jucier, more tender and, overall, just nicer.
"This pizza is good", she said. "Do you two want some?"
Then, after a pause, she added another question.
"What sort of meat is this, anyway? It tastes a bit like beef, but it's definitely different."
After she asked, she heard Jin address Oka.
"I see...", he said. "So anything you'd like to do, I'm feeling a bit tired after that fight, so something relaxing would be nice."
Seeing how they were interacting, and knowing Sakura all-too-well, Rider quickly got the subtext behind the question. The two of them were horny and wanted to have sex, and she was in the way. She would need to leave soon, to give them some privacy, but not until she had at least exchanged numbers with the sweet girl.