Her parents were the French painter Jules Lessore (1849–1892), who had lived in England since 1871, and his wife Ada Louise Cooper.
Her grandfather was Émile Lessore (1805–1876), a French ceramic artist and painter who had designed and decorated Wedgwood pottery from the 1860s onward.
[1] Her brother, Frederick Lessore, was a sculptor who founded and ran the Beaux Arts Gallery in London, and her elder sister Louise Powell (1865–1956), was a Wedgwood pottery designer.
[2] In 1931, The Times's review of a watercolour exhibition by Lessore noted her "serene" portrayal of subjects ranging from "children playing in London parks" to "people at the circus or theatre, Sussex fishermen, and a few pure landscapes", concluding that she possessed a "rare talent happily employed".
Her work for the company showed the influence of the Bloomsbury Group artists Vanessa Bell and Duncan Grant in its "loosely handled paint and formal abstraction".