Mary and Frances Waters

Mary and Frances Waters are minor characters in The Twins at St Clares. They are old friends of Pat and Isabel O'Sullivan.

Pat and Isabel have gone to stay with Mary and Frances during the school holidays. They play tennis together, and discuss their new schools. They all went to Redroofs School together, but now Pat and Isabel are going to St Clare's School, and Mary and Frances are going to Ringmere School, which is described as very exclusive.

It is unknown if the twins stayed friends with Mary and Frances after the girls went their separate ways.