Tweedle Dum (トゥイードル＝ダム Tuīdoru Damu) is a character who first appeares in Heart no Kuni no Alice. He is the twin brother of Tweedle Dee, and also the brother of firirel dee the both of them play the role of the Hatter Gatekeepers.
Tweedle Dum is one of the gatekeepers working and living at the Hatter mansion. Both he and his brother are known as the "Bloody Twins" due to the fact they are willing to kill anyone who comes by the gate — no matter if the person is an enemy or a friend unless ordered not to kill them by their boss, Blood Dupre.
Tweedle Dee - Dum's identical twin brother
Boris Airay - Dum's friend from the Amusement Park
Elliot March - A fellow worker at Hatter Mansion who Dee and Dum like to tease
Blood Dupre - Dum's boss
Alice Liddell-Which he calls his "Big Sis"