>>57923561In the anime, Lana, Lillie, and Mallow were adapted to Ash's age to maintain the essence of a real classroom. Kiawe and Sophocles' ages are not specified, but they are the oldest and youngest in the class.
This was clarified in an interview during the first episodes of SM in Japan, both by the voice actress for Sophocles and one of the writers. This was also clarified by the use of certain Japanese formalities during the Drampa episode in japan.
