Faith

Faith is a little girl who appears to Zoe Castillo on screens throughout Dreamfall. She appears as a small child in a white nightgown with long black hair, clutching a small doll. Usually, she is in a snowy landscape, with an Black Doll House in the background, and her image is broken up, as if by static. She manifests control over electronic systems, especially doors, and can insert herself into monitor images to assist Zoe, such as appearing in the Victory Hotel security cameras to lead her to room 201. Whenever she appears, she urges Zoe to "find her - save her; find April Ryan, save April."
Faith is a little girl created as byproduct of Project Alchera, who claims to be Zoë's sister. She was created under Helena Chang's supervision, causing much speculation that Chang may be, in fact, Zoë's missing mother, or a partner thereof.