In the Exhibition "Im Glanz der Zaren" in Stuttgart is a quote, by a court member, who says how cute and hearty Olga was with children.
Olga loved her niece (and problem child) Wera like her own, and also Weras twins were very close to her.
At the mentioned exhibition is a picture which shows Olga, after Karls death, hand in hand with her "granddaughter" Olga, Elsa stands behind them.
They were a sunbeam for her last years.