Sakura and Shirou
Shirou sighed at the girl's reply. If the other woman had raised her sword, then their target's response could easily have been justified self-defence. Equally, though, it may not have been, especially if the woman was strong enough to just shrug off the attack. Without seeing what happened in more detail, they had no way of knowing, and he was certainly not willing to just assume the worst and kill someone who may be innocent. Besides, if she was as powerful as she seemed, it was unlikely that they could easily defeat her anyway. They needed to do more research before they could have any reasonable chance of victory.
"If she raised her weapon first, then are you sure the target's response wasn't self-defence?" Shirou asked, rather undiplomatically. "I don't want to rush in and attack someone who may be innocent, even if her behaviour so far has been suspicious."
Sighing, Sakura immediately added her part, covering-up for Shirou's bluntness.
"Besides, regardless of guilt, I do not think we would stand a chance if we went against her now. We know too little about her, and her magical signature suggests that she is extremely powerful. We do have a very strong ally of our own, who will support us without question, but even her magical energy pales in comparison to our target's", she replied.
"We need to observe her, find out more information and plan our attack", Sakura continued. "And, as you say, find some more allies. If there was someone else there then we should definitely try to find them. They could shed more light on what happened, and they may be willing to assist us. And, sorry, but if this 'Neptune' is as strong as you say, then we need her help too, or at least we need to try. We cannot afford to be ignoring potential allies."
Sakura pondered for a moment, considering other possible allies, before recalling the group she had fought alongside some time back.
"I do have a few other allies I could perhaps call on", she said. "We'll just have to see who we can find, and if she attracts any attention from others."
Shirou then spoke up.
"Yeah, there was a girl I fought alongside, too", he said. "I'm not sure she's too interested in fighting without a reward, though...."