Rider
I suppose so, thought Rider as Dante responded to her comments.
Whilst it would be a big co-incidence for the girl to just look like Sakura, her lack of understanding of the master-servant system and the fact that she'd not instantly recognised Rider suggested that the first part of his statement, at least, was likely true. As did the weird pets that she had with her, pets that Rider had never seen anything like before.
However, when the girl responded, Rider couldn't help but let out a giggle at her mistake. Not that she could entirely blame her for it, mind, after all, she'd used the same misunderstanding on Tony earlier, as part of her flirting. Still, despite the amusement, Rider was very confused indeed. If the girl wasn't Sakura, then why did she look so much like her?
"I didn't mean that kind of master", Rider responded, the amusement clear in her voice. "My master has a boyfriend, we're not in that kind of relationship. She simply provides me with what I need to live, and I protect her from harm."
"Anyway, sorry for the confusion", she said. "It's just that you look exactly like her."
With that, Rider turned to the girl, smiling, and held out her hand.
"I'm Rider, nice to meet you."