Kaito Daimon

Kaito is a high school freshman who enjoys solving puzzles, feeling insulted whenever they are used for hurting others. He carries the Solver title, 'Einstein'. One day, he discovers the Orpheus bangle which attaches itself to his arm. Under high levels of stress, he enters a strange state known as 'Phi-Brain' that allows him to use his brain to its fullest potential and see the solution for any puzzle.