Riddle has a strong commitment to maintaining order among his peers. He makes it his duty to uphold hundreds of strange rules created by the Queen of Hearts as per his dorm’s customs. He can be seen as strict and intimidating by his fellow dorm members due to his severe punishments towards those who break the Queen’s rules, no matter how insignificant they may seem.

"Housewarden of Heartslabyul. A serious-minded student who firmly upholds the rules written by the Queen of Hearts. While a top student, he is easily angered and just as strict with others as he is with himself."