Ersberg served the Imperial family into the Russian Revolution, staying with them under house arrest at the Governor's Mansion in Tobolsk, Siberia in 1917.

Ersberg accompanied the White Army into Yekaterinburg to look for the remains of imperial family members; hiring a boatman to help her search in a swamp and a pond.

[1] During World War I, Ersberg taught the grand duchesses how to care for the sick, in order to prepare them for voluntary aid work.

[2] She accompanied the family in the train car on the way to Western Siberia, along with Count Ilya Leonidovich Tatishchev, Prince Vasily Alexandrovich Dolgorukov, Pierre Gilliard, Sydney Gibbes, Evgeny Sergeyevich Botkin, Countess Anastasia Hendrikova, Catherine Schneider, Baroness Sophie von Buxhoeveden, Anna Demidova, Ivan Dmitrievich Sednev, Klementy Nagorny, M. M. Kharitonov, and Alexander Volkov.

[4] When the rest of the imperial family were taken to Ipatiev House, Ersberg was not permitted to join them, instead staying in a train car on a siding with Gilliard, Tegleva, Gibbes, and Baroness von Buxhoeveden.

[4] At night a locomotive attached to the train car and took Ersberg and her colleagues to Tyumen, sparing them from the execution of the imperial family and other members of court.

[4] When Alexander Kolchak's forces seized Tobolsk, Ersberg was called in for questioning by Nikolai Alexeyevich Sokolov to provide information on the whereabouts of the imperial family.

[1] She accompanied the White Army into Yekaterinburg and hired a boatman to help her search for the imperial family members' bodies, looking in a pond and in a swamp, but was unsuccessful in finding remains.

[1] Upon entering Russia, Ersberg was given commands to appear at the All-Russian Extraordinary Commission, where she was instructed not to disclose any information on the life of the Tsar and his family.