(CV: Kouki Uchiyama)

Protagonist of the story. Reserved yet curious, he was saved from death and revived as an Awakener. He wields a shield Armament with the ability Assimilator's Core, allowing his shield to transform and take on the properties of another Armament.

(CV: Yui Horie)

A beautiful transfer student who joined Kazuki's class. A Nullity hunter, she took up that mantle in order to avenge her brother's death at the hands of the shadowy creatures. Despite appearing cold and distant, she eventually warmed up to Kazuki and his group of friends. Wields a sword Armament with the ability Crimson Lust.

(CV: Kana Hanazawa)

The first of Kazuki's childhood friends and a member of the school's swimming club with a special affinity for the spiritual. Polite, gentle, and caring, she occasionally shows a much more clingy and jealous side. After coming to terms with her feelings towards Kazuki and Sayaka, she unlocks her Armament, the bow with a powerful ability, Innocence Arc. 

(CV: Rie Takahashi)

An idol in hiatus. Often seen cheerful and upbeat as an idol, she hides a rather different personality and hidden frustrations behind that mask. Tends to show up in different hairstyles and hair colors, but her "ordinary civilian" look features a predominantly green side plait and glasses.

After unlocking her powers as an Awakener, she acquired the mic-shaped staff with the ability Prismatic Reverb.

(CV: Yoko Hikasa)

Voluptuous school counselor and an occasional substitute teacher. Lazy, haggard, and a tease, she nevertheless shows concern for her students. Quite knowledgeable with Mu and Nullities. She wields a necklace Armament with the ability Yata no Kagami.

She seems to have a past connection with Guren Izaya. 

(CV: Takahiro Sakurai)

An affable yet mysterious silver-haired man who works as a personal lawyer and legal adviser of the Ishida Conglomerate. Behind the scenes, he leads the group Euphoria, a minor organization that is heavily connected to Mu and Nullities. 

He desires the power from Mu and the Ascended Ones to create the ideal world for humanity.

He has connection with Miyuko Sadohara and a "Kiyone." 

He fights with the rapier Armament with the ability Yasakani.

(CV: Yui Ogura)

Kazuki's little sister. Very responsible and doting. A big fan of idol culture and Yuki-tan. Despite her snarky attitude at times, she cares a lot for her older brother.

She remembers little from the incident at the Fuyusato Grand Festival.

(CV: Rina Hidaka)

Hikari's friend and an exceedingly shy and soft-spoken girl. She was caught up in the Chronodome incident in Volume 3. After being saved in the said incident, she starts showing some affection towards Kazuki as her "older brother."

Along with multitudes of people, she was caught up in the incident at the Fuyusato Grand Festival. She remembers little of the actual incident.

(CV: Tomokazu Sugita)

Student council president and a very responsible senior who cares for his schoolmates. Affable and upfront, he can hide a surprisingly sentimental side. He has ties to the Ishida Conglomerate and is friends with a complete opposite in Reijy Ishida.

Shows a strong interest in the sciences and gets along well with Fuyusato Academy's engineering club.

(CV: Yoshitsugu Matsuoka)

A former heir candidate to the Ishida Conglomerate. Reijy was always seen with his clique and exerted a strong influence over Fuyusato Academy. 

He had strong feelings for his childhood friend, Akane Fujiwara, and he would do everything for their happiness. Opinions on her also soured his relationship with his father, who he had sworn to overthrow.

After the Fuyusato Grand Festival incident, he's missing and believed to be dead, but in reality.....

(CV: Risa Taneda)

Close friend of Miyuko Sadohara; Girlfriend of Guren Izaya. Active, energetic, and quite the go-getter, she acts as the life of the party who balances out Guren's uptight attitude and Miyuko's laid-back yet curious personality.

She regularly volunteers to be a participant in Miyuko's experiments regarding human and spiritual energy.

A parallel dimension that can be accessed through portals by certain people. With its heavy atmosphere, it is a place housed by Nullities.

The various pocket dimensions that are part of Mu. While Mu is the parallel world, Fragments can be described as individual "dungeons" of that world that may or may not connect to one another.

High-tech dome shaped convention center that is a pinnacle of Shiroki City's technological inventions. The biggest concerts are held here, and a part of it contains a museum that gets used for special educational tours.

Location of Volume 3's climax.

Location of the school trip in volume 2. A mountain region surrounded by a lush forest. Travelers often stop by to indulge in its various shops, visit its shrines, or relax in one of the many hot springs in the inns.

Home of the Magna Arbiter, an Ascended One, that consumed Fuyusato Academy in volume 4. Shadowy hands lurk the huge temple in place of regular Nullities, and they serve the purpose of feeding and helping the Magna Arbiter evolve.

It seems to have memory-altering properties for people who have no powers.

Shadowy creatures that take various forms and reside in Mu's Fragments. Said to be manifestations of human emotion.

An empowered person who has gained access to Mu and can manifest a spirit weapon known as an Armament.

Spirit weapons that can be summoned by Awakeners. All of them come with a unique combat ability connected with its wielder's inner desires.

Powerful Nullities who have transcended their limits, gaining advanced skills such as complex human thought and logic, as well as abilities that affect the human world far beyond the capabilities of typical Nullities.

Three of them exist: The Absolute Order, the Render of Bounds, and the Magna Arbiter.