Ida Emean aep Sivney

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Ida Emean aep Sivney, an elven sorceress from the Blue Mountains and a member of the Lodge of Sorceresses.

She is an Aen Saevherne, a Sage.

She doesn't wear precious metals or stones, preferring pearls, corals and ambers over them.

[edit] In "The Price of Neutrality" premium module

Reim, the elven scout mentions her, in a comment to Geralt about mages.