Ringo Andou is the main protagonist of Puyo Puyo 7. She exists in yet another different universe to Arle and Amitie, and is taught how to play Puyo by Arle when their school is flooded with Puyo.
Yu is a cheerful female ghost. From Puyo Puyo Fever 2 on, she is accompanied with her younger brother, Rei. Yu makes puns and is constantly silly. Her voice is also loud and, to some, obnoxious. She and Rei share the same birthday, June 9th, and the same blood type, AB, and both share a similar strategy to Harpy stacking puyo to the sides.
It is said that she would not be as cheerful if she were still alive. This may suggest that she had a difficult life.
Rei is the younger brother of Yu, normally backing up what she says. He was missing in Puyo Puyo Fever, but is in Puyo Puyo Fever 2. He can be found outside the Post Office in this game. He and Yu share the same birthday, June 9th, they also shared the same blood type, AB. Rei is the opposite of Yu, while his sister is excited and playful, he has a resentful mood.
According to game documentation, Rei was happier when he was still alive.
Seriri is a mermaid that lives in a lake. She is a good friend of Owlbear, and is Suketoudara's love interest, although she is oblivious to his crush on her. Additionally, she has a shy and nervous disposition, stemming from belief in a legend that states that eating the flesh of a mermaid will grant one immortality.
Carbuncle, also known as Car-kun, Kaa-kun or Carby, is the unusually happy mascot of the Puyo Puyo games. He used to be the pet of Satanin Madou Monogatari 2, but stuck around with Arle ever since. He has a tendency to wander off in search of adventure, thus creating many wacky situations. In classic Puyo Puyo games, he can normally be found in a box somewhere on the frame surrounding the field. He also has the strange ability to fire a laser from his forehead.
Witch is a witch that debuted in the Madou Monogatari series. She has random moments of giggles, and can be seen as hyperactive. Witch also apparently aspires to one day attain great magical power, making her yet another rival of Arle.
Maguro Sasaki is a student at the school in Puyo Puyo 7. This Suzuran Shopping District's resident is the fashionable eldest son of the fishmonger. Very fashionable, but also very strange. He has purple hair that covers his eyes. He uses Dongurigaeru's dropset. He is constantly carrying a Puyo-themed kendama, a toy similar to a yo-yo or ball-in-cup - the tricks he performs with this toy comprise his attack animations. His name means tuna, which makes some sense considering he is the son of a fishmonger. His Mini/Chibi form also reflects upon this somewhat.
Maguro has an asymmetrical design in Mega/Deka form. However, since neither of his other two forms have asymmetry, no additional art and animations were coded to reflect this, not even in the Wii and PSP versions.