I have FOTR with me right now, so I can tell you she's mentioned twice in that book: (1) described on p. 4 as "first lady's maid to the empress" and (2) on p. 60 as having arrived in Toblosk either the fall or winter of 1917, along with five other household/staff members, and that of those six only she, Gibbes, and Klaudia Bittner were admitted to the house where the family was being held.