Machiko puzzles over this. She supposes that sensei refers to Gamma, or possible traitors, or more generally to the repugnant "flower" of racism, anti-meta hatred, that rises like so many poisonous weeds from many innocuous-looking gardens. Perhaps he wishes to interrogate the members of White Octagon personally, to lay bare their deepest secrets. Yet, Machiko is forced to reconsider her thoughts when Honjowara -sama glances at Kuroda -sensei , and says, "Do not speak in riddles, old friend."