Rider
Rider smiled as she watched Jeanne grab Sakura into a hug and thank her profusely, glad to see that the servant had already come to understand just how wonderful a master Sakura was. She continued to smile ever-more-broadly as Sakura reacted with a display of her kindness and warmth, hugging the servant back
Jeanne soon released her, clearly embarrassed by her sudden display of affection. Rider smiled an amused smile as Jeanne embarrased herself apologising, calling Sakura "cute", something Rider couldn't honestly disagree with, before gathering herself together and calming her embarrassment. Then, she turned to Shirou, complimenting Sakura's kindness and he, in turn, also complimented the sweet girl, causing her to blush and look down with embarrassment.
However, despite accepting Sakura's kindness, Jeanne was still not finished with her concern about Sakura's generousity, now saying that she felt bad about living off Sakura if she couldn't provide anything in return. Rider wanted to facepalm at the other servant's idiotic statement, well aware that their role as servants, protectors and friends for Sakura and her family was easily enough of a "return" for the kind girl. Before she could say anything, though, Sakura twirled over towards Shirou, clearly buoyed by the praise he had given her, and wrapped him in her arms, before making the point to the servant that Rider would have made.
Rider smiled at her master's kind words to the new servant, although the reference to protecting Shirou first and foremost was a little worrying if entirely unsurprising. She was glad to have such a wonderful, caring master, and she was glad that Jeanne felt similarly.
"Jeanne, you should not worry that you are taking advantage of Sakura, because you are not", she said, smiling. "She simply wishes us to live happy and fulfilled lives, just as we ensure her happiness by protecting her from anyone who intends to harm her or her family. Seeing us happy also makes her happy, so you should not feel guilty about it."