D/D/D

"Declan Akaba on the D/D/D."

- "D/D/D" stands for Different Dimension Demon. Taste of the power of demon kings that have conquered different dimensions.

"D/D/D" ( DīDīDī), known as DDD in English manga, and pronounced "Triple D", is a sub-archetype of the "D/D" archetype used by Declan Akaba in the special Yu-Gi-Oh! ARC-V chapter and anime. The "D/D/D" monsters serve as the "bosses" of the "D/D" due to most of their gameplay focusing on their summoning.

Design
So far, every "D/D/D" monster has been named after either a historical person, usualy a military leader, or a mythical final battle and they encompass all of the Extra Deck Summon Monsters as well as some Main Deck Effect Monsters. Most of them have an attributed office role from a pun on their name, creating Demonic hierarchy themed archetype.

Etymology
According to Declan Akaba, "D/D/D" is short for "Different Dimension Demon" (ディファレント・ディメンション・デーモン Difarento Dimenshon Dēmon). The "D/D/D" archetype marks the first time that monsters with the word "Demon" (or "Daemon") in their names are released in the TCG, with said word intact. However since the word "Demon" is simply represented in the card names via an acronym, the use of this word is comparatively subtle, and the English anime does not have Declan mention this detail.