Rei Kido (鬼堂 怜), commonly referred to as Rei-kun, is a character in the Puyo Puyo series. He is known as a mysterious and quiet shaman who specializes in communicating with spirits. Rei often acts as a calm and collected observer, using his spiritual powers to guide and support other characters. Despite his aloof demeanor, Rei is compassionate and deeply cares for his friends. He plays a supporting role in the series, offering wisdom and supernatural insight in challenging situations.