Ice Maiden is an imaginary security person employed in the PanOpticon building.  

In the novel number9dream, while drinking coffee at Jupiter Café, Eiji Miyake imagines entering the PanOpticon building, where a woman on a screen asks him for his name and business. He does not know her name and even wonders, briefly, whether she is human or a computer simulation, but he finds her “blemishlessly, symmetrically beautiful,” and refers to her as Ice Maiden for the duration of the segment. He tells her that he is Ran Sogabe,  a “Goldfish Pal” who has come to PanOpticon to service the aquarium of the law firm Osugi and Bosugi.