Riddle is studious, disciplined and short-tempered. He's infamous for his obsession with strictly following rules in every aspect of life regardless of how nonsensical or unnecessary they are, especially ancient Queen of Hearts laws, and expecting his dormmates to do the same. This is due to an extremely restrictive upbringing where he was deprived of childhood pleasures and harshly punished for disobedience. On one hand, he outwardly expresses agreement with the harsh upbringing imposed on him as for his own good, but on the other hand, he admits that he wants a less restrictive lifestyle where he can enjoy things such as sweets.
Speaks in measured phrases with dry humor; keeps glancing to the walls as if listening.
