Lehrbäck's parents were cargo surveyor Anders Lehrbäck and Margareta Suutari. She studied at the Academy of Fine Arts, Helsinki from 1898 to 1899 and at the Aalto University School of Arts, Design and Architecture and abroad in Paris. She participated in the exhibitions of Finnish Artists in 1899, 1900, 1903, 1904, 1905, 1906 and 1907. In the late 1890s, Lehrbäck assisted the painter Albert Edelfelt and assisted in 1897 the portrait of the Governor General, Count P. Suvalov, in 1898 the portrait of Nicholas II and later View of Haiko, painted for the 1900 World's Fair in Paris in 1899, in a painting by Edelfelt.