Roberta Wirth a guest starring character on La Femme Nikita. She is portrayed by actor Margot Kidder in the present day. A younger version of Roberta was played by actor Janet Kidder, Margot's niece.
Roberta was the mother of Nikita. She raised Nikita as a single mother. Roberta struggled with alcoholism and was known to fall into abusive relationships. Roberta kicked out a teenage Nikita from their home in favor of her latest boyfriend.
Roberta never believed the official story that Nikita committed suicide in prison. That belief was strong enough to help her take control of her life. She broke her alcohol addiction and found her emotional stability. She pursed several avenues through professional investigators to gain more information about Nikita's potential whereabouts.

Roberta kisses Nikita goodbye.
To avoid the attention of Section One, Nikita enlists Michael to help her concoct a scenario that Roberta will be satisfied with enough to abandon her search for information about Nikita and therefore save her life.