I cannot find anything about her.
From www.liveinternet copy.ru-users-supersergacheva.
The sitter's dress has a buttoned bodice decorated with criss-crossing strips. Her dress has pagoda sleeves with ruffled/flounced under-sleeves.
Keywords: Strelkovsky, S. S. Botkina, Botkin family, Russian. straight coiffure, high neckline, collar, lace, revers, stomacher, buttons, three quarter length pagoda sleeves, under-sleeves, ruffles, vee waistline, full skirt, earrings, pin, bracelets, wrap