(NOTE: 2 ACTORS) Yu is a cheerful female ghost. From Puyo Puyo Fever 2 on, she is accompanied with her twin brother, Rei; they are collectively known as Yu-chan & Rei-kun, or simply Yu & Rei. Yu makes puns and is constantly silly. Like Harpy, Yu (and Rei) starts a match by lining the left and right walls with Puyo.  Rei is the twin brother of Yu, who usually backs up what she says. He was missing in Puyo Puyo Fever, but appears in its sequel, Puyo Puyo Fever 2. Rei is the opposite of Yu; while his sister is excited and playful, he has more of a reserved, gloomy personality.