hanaktoba anon here I think another interesting symbolic motif is abstract art. specifically those fuckass ties. Ena AND Len are Neoplasticism???? And Mafuyu is splatter paint Jackson Pollock and Kanade is puddle pour and is Mizuki hard edge???? Can you tell I do NOT take art history idk what these styles are called... When I saw the squares I thought Mondrian right away but the colours aren't primary...idk I think that Ena and Mafuyu being somewhat opposites in abstract art could mean smth.