Sonya Levy was an archivist at Yad Vashem. I gave her a job when she made aliya from Bulgaria in 1996, and from then until shortly before her death she was in charge of the Bulgarian collection, which she also considerably expanded by bringing in additional microfilmed collections. I didn't have much daily contact with her. There were 150 people on the archives staff, Sonya was competent and needed no interventions from me, and my focus was on other things.
A few months ago she passed away, 57 years old. Her friends have now put up a tribute to her on YouTube - in Hebrew, the language she (and they) adopted. May she rest in peace.