Seer: Ray, Let’s Fall in Love Under the Full Moon

Rei is the most popular character in the game, the leader of the Godship Alliance, and the guardian deity of Helka Star.

The people of Helka Star altered the genes of their original guardian, Erik, and corrected the desire to "rule" in his heart. They filled the new generation's guardian deity with a desire to "protect" instead. This newly created spirit was Rei. From then on, Rei became the guardian deity of Helka Star. After its people left, he protected the planet's treasures and waited for their return. During this time, Rei met the Seer crew, who had come to the planet. When he and his archrival Gaia were captured by pirates, he joined forces with the Seer crew to foil the pirates' scheme. From then on, he became friends with the Seer crew and worked alongside them to maintain peace in the universe.

In the animated series, he enters the Ares Crystal contest as an acknowledged strong contender. At the last moment, he strikes the Ares Crystal with a bolt of lightning and wins it, earning its recognition as a strong contender. He then wishes to find the Infinite Energy Source.