Sakura
A confused look came over Sakura's face as the weird man approached her, dressed in a suit of armour. Yet, despite his weird attire, he didn't seem hostile, waving kindly to her as he approached, acting as if he knew her.
"Excuse me, miss? Do you have an older sister by any chance? An incredibly strong one who looks similar to you but with a larger build?" he said, leaving Sakura even more confused.
She did, of course, have an older sister, and they could maybe even be said to look alike, if you ignored the hair colour, eye colour and body shape. Maybe she could even be called "incredibly strong", if she happened to use her magic. But, there was no way Rin could possibly be described as having a "larger build" than her younger sister. The combination of all the factors made her sure that he was not talking about her real sister.
Yet, despite the man's weirdness and his odd question, Sakura saw no reason to turn him away, so she responded.
"Erm..., no, my sister doesn't fit that description. Why?" she replied, obviously confused.