The main protagonist. Phoron is a Dantist working in the Tsuge Divine Music Player Office. Although he is the master of the Red spirit, Corticarte, he doesn't have a full control of her (because Cortica always wants to follow her own will). He plays an organ-like instrument (that is seen in the first season [Shinkyoku Sōkai Polyphonica] that can transform into a motorbike. He also uses a backpack piano-like One-Man Orchestra in occasions where he cannot uses his motorbike. He is a very kind boy, but very naive and sort of dense or slow. He once said that the reason he is playing the commandia is for that "Someone he loves" which actually means his contract spirit "Corti."
Corticarte Apa Lagranges (コーティカルテ・アパ・ラグランジェス,Kōtikarute Apa Raguranjesu?)
The spirit, Tatara made a contract with. Corti, as Phoron calls her, is one of the eldest spirits in their world, having six wings and called the Red Elder Spirit —- as well as other titles such as Crimson Annihilator or Bloody Duchess. She is entranced by young Phoron's singing voice and thus decides to make a pact with him so he will be hers only. In Shinkyoku Soukai Polyphonica Crimson S, she actually has eight wings in total and is called 'Crimson Queen'.
Most of the time, Corti has the appearance of a child. Her past contractor is Kuchiba Kaoru.
The boss of the Tsuge Divine Music Player Office. She has a very strict character about jobs, and plays a violin-like instrument. She has a contract with two spirits, Yardio and Mashat, of whom the latter is seldom seen. In the Shinkyoku Sōkai Polyphonica Crimson S she helped Phoron in fighting against the enemy.
Yardio Voda Munagoul (ヤーディオ・ウォダ・ムナグール,Yādio Voda Munagūru?)
Eufinley's covenant spirit. On the day they meet, Yardio quickly tried to make a covenant by kissing her, but received a punch in his face instead. He is a laid back character in contrast to the more serious Eufinley. He also likes to fight, and his power level is above most four winged spirits. Unlike Corti, Yardio is more blatant in showing that he likes Eufinley.
Prinesca is Perserte's younger twin sister. She also works at Tsuge Divine Music Player Office. Everyone in the office usually addresses her as Prine (プリネ,Purine?) except Phoron. She is actually half human half spirit because when she was a child, she almost died from a terrible accident. Her father's spirit saved Prinesca by offering to fuse herself with Prine, but with the consequence of ending her own life.
Originally the main heroine of Polyphonica Black series, she made appearance in episode 7 of the Crimson series, and played as a reoccurring character in various further episodes .
A silent girl with long black hair, black eyes, and a black cape. Although at first it seems she's the Spirit, Matia is actually the Dantist, and a good one. Her instrument is a blues harp. Although not as complicated as a One-Man Orchestra, it is similar to the instruments of the past which require higher technique to play Commandia with. She also likes hamburgers.
Managariastinockle Lagu Edraikerius (マナガリアスティノークル・ラグ・エデュライケリアス,Managariasutinōkuru Ragu Eduraikeriasu?)
Managa is Matia's covenant spirit. He is described as big, wearing all black and eyes like a bear. When together with Matia, they look like father and daughter.
Managa is actually a gentle person. He is a three winged spirit, which is not natural, and his wings also look torn and battered. In the timeline of the White series, he looks younger and has six black wings colored in gold. As an old spirit, he and Corti had met, but when they meet again, they don't recognize each other because their different forms. Managa is also the Black Beast which means he is meant to protect the black goddess.
The main character from the Polyphonica White series. Entitled the White Holy Beast (which means he is the beast of Eternalia, the white goddess), he can conjure a Contra Bass named Eternal White. He is a 6-winged spirit with snowflake-like wings. He and Corticarte are very good friends. In the anime, he is seen in episode 6 asking Phoron and Renbart if they like pickled plums (Umeboshi). Phoron turns him down due to the search for Aria's cat, but Renbart buys a jug of pickled plums from him. Like Yardio, Blanca also has a humanubic and a belst form (a dog-form. Normally it appears to be the one of a puppy, but he has also an adult dog form.)
In the last episode, he's shown briefly with his Dantist, Snow Drop.
The Dantist of Eliphas Blanca Albiona, the White Saintly Animal. Having no memories of her family or her past, she is taken in by the Granard Family and is made the personal maid of the daughter Primrose. Snow is seen as a sweet and soft-spoken girl who attends a Shinkyouku School. At times, in the battlefield, she can become a brutal opponent at the most. She is seen in game clips wielding a katana, a Japanese sword. Her instrument is a contrabass called the Eternal White.
She is seen in the last episode with Blanca in the anime.
Mailreit is the spirit that made a contract with Akatsuki. It is said that Mailreit has good underwater battle skills. Ever since Dirrane began hating her, she pretended to be able to feel his Commandia, even though their soul can't connect and gives her a lack of power.