Answer
An Avant-garde artist, Mikhail Larionov was Natalia Goncharova's partner. They both played significant roles in the development of the Russian avant-garde movement during the early 20th century. Larionov's artistic contributions included painting, drawing, and stage design. Notably, he co-founded the avant-garde art movement known as Rayonism, characterized by the use of intersecting planes and vibrant colors to convey a sense of dynamism and energy in his artworks.