" Morisu, on the other hand, could feel passionate about things in a different way from Kawaminami, yet it was rare to see that side of him in his everyday life. He was the type who kept his thoughts to himself, thinking everything over until he was satisfied before taking any action. To Kawaminami, his friend Morisu was a wise advisor, who would stop him from making rash assumptions or jumping to wrong conclusions. "
― Yukito Ayatsuji , The Decagon House Murders (Mansion Murders #1)