Who is Miss Gwladys Pendlebury from Life with Jeeves and what is their importance?

Miss Gwladys Pendlebury is an artist. Bertie and Gwlady's meet at a party in Chelsea, where Bertie falls madly in love with her and cancels the trip on his Aunt Dahlia's yacht in the Mediterranean. He gives up his trip in order to thwart any advances on Miss Pendlebury by his rival Lucius Pim.