They are the top scientists who worked with Nexus in Nutri-Genex.  In order to save the foods and the chapters of the Grand Book of Nutrition, they escaped to faraway places and set up the Seven Kingdoms of Nutrition:  Yellow (Grains), White (Milk and Dairy Products), Red (Meat and Eggs), Blue (Fish and Sea Food), Brown (Legumes), Green (Vegetables) and Orange (Fruit).