Four Dimensions

English= "The world that is divided into 4 dimensions, in there exists 4 boy with the same face. The Dragons they possess are calling out, as if seeking each other."

Japanese= "つのにかれた. そこにはのじをつがし. がつドラゴンはびう、あれでいをめるかなに."

In the Yu-Gi-Oh! ARC-V anime, the universe is composed of four different dimensions, in which each inhabitant uses different Extra Deck Special Summon methods. The dimensions are the Fusion Dimension, the Synchro Dimension, the Xyz Dimension, and the Standard Dimension. According to Yūto, the Standard Dimension is in the center of the others. While inhabitants of the Fusion, Synchro and Xyz Dimensions use Fusion, Synchro and Xyz respectively, the Standard Dimension initially did not have its own unique Special Summon mechanic, and instead each of the others was taught to students at Leo Duel School in Maiami City. Recently, however, an anomaly gave rise to a new Summoning mechanic, the Pendulum Summon.

According to Leo Akaba, the Four Dimensions were once a United World that got split after a Duelist who was driven mad, Zarc, went on rampage and brought the United World to the brink of destruction until a Duelist named Ray defeated him that resulted with the world got split into the current four dimensions.undefined

Each dimension also has its own dragon that represents that dimension's trademark Summoning mechanic, as well as a bracelet that is visually evocative of it.

Dimensional Dragon Users

 * Yūya Sakaki
 * Yūto
 * Yūgo
 * Yūri

Bracelet Girls

 * The Bracelet Girls 145.png Hīragi
 * Serena
 * Rin
 * Ruri Kurosaki

Inhabitants by dimension
The huge majority of characters in the anime are residents of the Standard Dimension, therefore their names are too numerous to list.