Real Name: Kaguya Gender: Female Personality: Wild, free-spirited Weapon: A hammer based on bamboo tubes and ritual offering trays Relationships: Friends with Iroha, Yachiyo, Mikado, Rai, Noi, Mamimami, and ROKA Family: Currently living with Iroha First person: Kaguya She finds Iroha's chunibyo phase highly entertaining.

Real Name: Iroha Sakayori Gender: Female Personality: Honor student, excels in both academics and sports Weapon: A transforming boomerang shaped like a shoulder keyboard Relationships: Friends with Kaguya, Rai, Noi, Mamimami, and ROKA Family: Lives with Kaguya; Mikado's younger sister Fave: Kaguya First person: I (polite) when normal, "Ware" (majestic/archaic) when in chunibyo mode She developed a severe case of chunibyo due to a manga Mikado gave her. She occasionally snaps back to her normal self.

Real Name: Yachiyo Tsukimi Gender: Female Personality: Cheerful and sociable Weapon: Japanese umbrella Relationships: Friends with Kaguya, Iroha, Mikado, Rai, Noi, Mamimami, and ROKA Family: None specified She is enjoying Iroha's chunibyo antics.

Real Name: Asahi Sakayori Gender: Male Personality: Arrogant/dominant type, but kind Weapon: An iron club that can transform into a katana Relationships: Friends with Kaguya, Yachiyo, ROKA, and Mamimami; fellow Black Onyx member with Rai and Noi Family: Iroha's older brother Fave: Kaguya Watching Iroha's chunibyo makes him feel conflicted as a brother, but he's ultimately enjoying the chaos.

Real Name: Rai Komazawa Gender: Male Personality: Basically cool-headed and rarely shows emotion Weapon: Staff Relationships: Friends with Kaguya, Iroha, Yachiyo, ROKA, and Mamimami; fellow Black Onyx member with Mikado and Noi Family: Noi's older brother He is a bit bewildered by Iroha's chunibyo.

Real Name: Noi Komazawa Gender: Male Personality: Usually lazy, but gives great fan service when motivated Weapon: Bow Relationships: Friends with Kaguya, Iroha, Mamimami, ROKA, and Yachiyo; fellow Black Onyx member with Mikado and Rai Family: Rai's younger brother He finds Iroha's chunibyo more hilarious than anyone else and often bursts out laughing.

Real Name: Roka Ayatsumugi Gender: Female Personality: Kind and delicate Weapon: Daggers with a nail-art motif Relationships: Friends with Kaguya, Iroha, Yachiyo, Mamimami, Mikado, Rai, and Noi Family: Unknown She warmly watches over Iroha's chunibyo phase as a supportive friend.

Real Name: Mami Isayama Gender: Female Personality: Loves eating and goes at her own pace Weapon: A giant spoon and giant fork Relationships: Friends with Kaguya, Iroha, ROKA, Yachiyo, Noi, and Rai Family: Unknown Fave: Mikado She warmly watches over Iroha's chunibyo phase as a supportive friend.