Colour purple. Named after Miss Ralston who served as Headmistress for 44 years, retiring in 1963 and her family. Her brother John Ralston was the first Chairman of the Board of Governors and her nephew John Ralston was a Chair as well. She purchased the School in 1920 and moved it from the hall of St Thomas to its present location. Fernleigh Adams (Year 10, 2003) designed the badge and its motto Loyalty and strength incorporate parts of the Ralston family crest. They won the House competition in 2004 (the first year they were added as a house) and 2010.