Rider
Rider paid little attention to the man who was now leaving, apparently unable to deal with Vanguard's presence. He was no threat to Sakura and Sakura had no apparent wish for him to remain, so it was of no interest to her what he chose to do. Instead, she chose to focus on the two blonde women, looking them over somewhat suspiciously, awaiting Sakura's verdict on whether they could remain. Finally, her master spoke.
“Maybe you can join us if you can abstain from being so rude", she said, leaving Rider unsure who she was addressing. "Rider, stop giving her so much trouble, it’s fine, she can come in. Maybe even join us for breakfast?”
Rider was slightly confused. Did she mean Vanguard was being rude, or the other girl? However, she was fairly certain that Sakura had decided to trust the woman who claimed to be Vanguard, at least, and Rider saw no need to argue with her decision. She herself was fairly sure that the woman claiming to be Vanguard was, in fact, Vanguard and could be trusted, only her own, cautious nature was preventing her unconditionally accepting that. And, even if she was less certain, right now Sakura needed her to be loyal. Sakura was still very fragile and frightened of losing her friends once more, and Rider knew that any disobedience would just feed that fear.
Before Rider could say anything, however, the other blonde woman spoke up, suddenly sitting on a seat which had seemingly just appeared out of thin air, although Rider got the feeling it had always been there. Rider looked at her with deep suspicion as she spoke, claiming she had no ill-intentions, but had simply come to them on a whim. Rin, as usual, seemed curious, asking the girl how she had manifested the chair. Sakura, however, was far less impressed.
Rider, can you send her on her way? she said over their mental link.
Vanguard, too, seemed very put out by the other woman's presence. It seemed to be someone who he knew, and who he was very scared of.
"Vanguard, who is that woman?" she asked, curious.
"Well, I guess it is not of importance", she said, before turning to address the blonde woman, keeping a firm grip on her weapons, "I am sorry, but my master wishes for you to leave. Could you please do so immediately."
Then, she turned back to Vanguard.
"As for you, Vanguard, I apologise for my earlier cautiousness. As Sakura said, you are welcome to come in, and congratulations on your new body, however you obtained it. I assure you that you will very much enjoy breakfast."