Wait, Goethe? Didn't he write about Faust...? Rider thought, vaguely recalling that she'd heard the name somewhere.
As she opened the book and began reading, Rider's suspicions were confirmed, and she chuckled to herself slightly.
Hmm, he really wants me to read his story? Well, let's see what happens....
She knew some of his past due to his nature as a Heroic Spirit, but her knowledge was somewhat limited. Learning more about him would be very helpful.
She continued reading for hours, becoming more and more disturbed by his treatment of Gretchen. Not that she really cared about her, as such, but if he was willing to treat her in that manner, then what was to say he would not do the same to Sakura?
Continuing to read, she reached a part about a witches mountain-top orgy, and couldn't help but be amused, and somewhat aroused, at the thought of her master and her sister dancing around naked in some evil orgy. Although, admittedly, from what she knew of Sakura's sexual drive, she could almost believe the orgy thing, if not the "evil" part....
However, at the same time, her opinion of Faust became worse and worse as she saw him dancing around without a care in the world, forgetting about poor Gretchen and her plight. What if that were Sakura? Would he treat her in the same way?
She continued reading and, to her relief, Faust finally showed some moral backbone on seeing Gretchen's apparent state. Perhaps he wouldn't be quite so bad after all. Still, she needed to know where this would end up, to know more about the sort of person he really was. Instead, though, the next chapter seemed to be a small intermission, mostly filled with thinly-veiled tirades at people Goethe presumably hated. She continued to read when ,suddenly, there was a bright flash in front of her.
What the hell?
She looked at the source of the flash, and saw a giant armoured man kneeling before her. Before she could ask what was going on, he spoke with a booming voice.
"I have heard and heeded to your summons at once. I ask of you, are you worthy to be served by my blade?" he said.
What? Is this a servant? If so, how did I summon him?
Rider pondered her response for a moment, sensing a new influx of mana from the now-awakened Sakura as she did. She wanted to accept the offer. After all, more power for her meant more ways to protect Sakura, including from Faust if necessary, and she had no idea how this being would react to her suggesting an alternate master. At the same time, though, she knew that, whilst Sakura trusted her absolutely, Faust had no reason to do so. She did not wish to give him good cause to question her loyalty to Sakura, as an unqualified acceptance would imply. After a few moments of thought, she replied carefully.
"I am unsure if you would consider me worthy, but I would be glad for you to serve me. However, I myself serve another person, and I will use everything I can to protect her. To become my servant is to become her servant also", she said.