In the Fate/Stay Night Visual Novel, why is Rider listed as Chaotic Good? The in-game encyclopedia entry for Rider in Fate/Stay night lists her as chaotic good. This is true regardless of what route you are on and who is her master. However, at several points in the story she is noted as being evil, and it's said that the only reason she (along with a few other servants) could be summoned is because the holy grail was corrupted. These seem to pretty strongly contradict each other.

Am I missing something subtle (maybe a translation issue, or maybe I'm misunderstanding alignment) or is this a mistake by TYPE-MOON and Rider should be listed as evil in the encyclopedia?
Fundamentally, Rider doesn't seem to shy away from evil deeds - most notably her actions at the school. She doesn't perform them with glee, but unlike, say, Saber, she doesn't resist her Master's commands when they lead her in that direction.

I tried to obtain a full transcript of the game to analyze every time she is mentioned as "evil"; however I couldn't find any. The following is from my memory: Most narration is made from the standpoint of another character, usually Emiya Shirou. And you can't blame him, or his compatriots, for labeling Rider as evil; however, most of this is more due to her Master's orders.


  In Heaven's Feel, Rider's true goal is revealed - and it is, in fact, a noble one. All of the previous events are implied to have been because of her loyalty to Sakura - disobeying Zouken or Shinji would have had direct repercussions on her. In fact, Rider is significantly more powerful in Heaven's Feel than in any other path - this is most likely due to a reluctance and half-heartedness when obeying Shinji; in other words, she was faking it and not giving her all in hopes of being defeated.