Blessed with a photographic memory, Cass remembers details, directions, faces, and names perfectly. Left behind after his parents were arrested for a series crimes, Cass has a nervous personality. He is terrified of heights and animal, lacks the coordination necessary for most sports, and has a nervous stomach. He also has a knack for devising codes and can speak backwards.
“Just trying to retrace the exact path I took at three o'clock or so. I committed my foot placements to memory. The patterns of the little pebbles in the blacktop. And the ssarg.”