Twins based on the characters Tweedledum and Tweedledee that besides being twins and finishing each others' sentences on occasion, they look and act nothing like their counterparts. Dee and Dum are the young gatekeepers to the Hatter Mansion. Due to their young age, they often slack off and love money and killing. They have a violent tendencies and actually tried to kill Alice upon first meeting her, thinking that slitting her throat would be a fun game. They don't think life is important, thinking that Alice, like everyone else, will have a replacement. In Joker no kuni they are seen being able to change into an adult form.
