Revival Zero

"Revival Zero" (リバイバル・ゼロ Ribaibaru Zero) is the name of the project devised by Leo Akaba.undefined It is linked to the ARC Area Project and involves Serena and Yūri. As a result, Reiji believes that Yūya and his counterparts are also one part of Leo's plan. Within this project is two subcategories, Z-Arc and Ray-A. It's later revealed that Revival Zero's main purpose is to recreate the Original Dimension that was split into Four Dimensions so Leo can revive his daughter, Ray, by fusing Yuzu Hiragi and her counterparts, the four girls who each are her reincarnation following her clash against the Demon Duelist, Zarc.

Trivia

 * Ray in Japanese is romanized as “Rei”. And “Rei” is another way to read the kanji "零", which can also be read as “Zero” in Japanese, thus the project name, REVIVAL ZERO.