Dimensional Counterparts

A dimensional counterpart (そっくり, sokkuri in Japanese, meaning "like") is a phenomenon featured in the Yu-Gi-Oh! ARC-V anime, in which a person from one dimension resembles another person from another dimension. In addition to sharing the same face, the counterparts seem to be drawn to each other for an unknown reason.

History
Accordingly to Reo Akaba's actions, it is hinted that these counterparts are important to his plans. He is interested in Serena's unknown abilities and also expresses interest in getting a hold of Yuzu's bracelet, stating that she is the "fourth piece" he needs, having already had Yuri capture Ruri and Rin for him.

Mistaken Identities
A common recurrence is for a character to confuse one counterpart with another counterpart due to their identical facial structures. Instances of confusion include: