Rider looks at you blankly. It's hard to read the expression of the servant, since some visor-like eye cover is covering her eyes. She stands straight up and has an odd and complex aura that is difficult to really explain.

"I see. I have answered your call, Master. I am your servant within this Holy Grail, you may know me as Rider. I will serve and fight for you as best as I can."

She says in a blank voice. She looks blankly at you, awaiting a response. Her voice is quite calm, and doesn't hold any emotion to it at all. A difficult servant to see through.