Shirou and Sakura
"Yes, I suppose. You did not seem to be hostile, that is why I did not attack you. But, it never hurts to be careful", he replied, relaxing and de-summoning his swords in response to her claim.
"Do you have something to allow you to see the target from here?" he added, curious as to why she was on the rooftop. "My wife is currently using a familiar of hers to check up on her."
Sakura, meanwhile, couldn't help but notice the cute couple flirting next to their target. However, to her surprise, the girl from the couple then turned to the attractive target, calling her a demon and accusing her of interfering with the man's emotions. Whilst she couldn't confirm any of it just yet, it was certainly worrying. Being a demon did not, of course, mean she absolutely had to be hostile, after all, her servant was famous for being a monster, and she was perfectly nice. However, it was still not a good sign, and the manner in which she was seemingly abusing her magic was very bad. Turning to Shirou, keeping focus on what the familiar was seeing all the while, she spoke.
"Senpai", she said, "the woman with the target seems to think she's a demon. And that she was abusing mental magic to control the man's emotions."
"That is worrying, if true", he replied. "And it makes sense, too, she was flying around before, after all."
"And she has a tail", Sakura added. "So, yes, I think she might be a demon."
"Any idea what type", Shirou responded.
"Hmm, I'm not sure, but the two of them seemed to be flirting with each other very heavily and the other girl was talking about love being in the air, so her magic may be something related to love. A succubus, maybe?" Sakura added.
"That could make sense, yes", he responded, before turning to the girl.
"Oh, sorry, we got caught up in our work and forgot to introduce ourselves. I am Shirou, and this is my wife, Sakura", he said, as Sakura bowed politely. "Who might you be?"