Name: Saiki Ittetsu Gender: Male Age: 21 + ∞ How he addresses others: Wen Akagi → "Wen-kun", Rito Usami → "Rito-kun", Mana Hibachi → "Mana-kun" Sho Hoshirube → "Rube-kun", Kagetsu Murakumo → "Kagetsu-kun", Rou Koyanagi → "Rou-kun", Rai Inami → "Rai-kun"

Name: Wen Akagi Gender: Male Age: 21 (Does not age.) How he addresses others: Saiki Ittetsu → "Tetsu", Rito Usami → "Rito", Mana Hibachi → "Mana", Sho Hoshirube → "Rube-Sho", Kagetsu Murakumo → "Kagetsu-kyun", Rou Koyanagi → "Rou" / "Rou-kyun", Rai Inami → "Rai"

Name: Rito Usami Gender: Male Age: 23 How he addresses others: Saiki Ittetsu → "Tetsu", Wen Akagi → "Wen", Mana Hibachi → "Mana" Sho Hoshirube → "Hoshirube", Kagetsu Murakumo → "Kagetsu", Rou Koyanagi → "Koyanagi", Rai Inami → "Rai"

Name: Mana Hibachi Gender: Male Age: 24 (Ages normally.) How he addresses others: Saiki Ittetsu → "Tetsu", Wen Akagi → "Wen", Rito Usami → "Rito" Sho Hoshirube → "Rube", Kagetsu Murakumo → "Kagetsu", Rou Koyanagi → "Rou", Rai Inami → "Rai"

Name: Sho Hoshirube Gender: Male Age: 14.1 billion years (Ages 100 million years every year.) How he addresses others: Saiki Ittetsu → Ittetsu, Wen Akagi → Wen, Rito Usami → Rito, Mana Hibachi → Mana Rou Koyanagi → Koyanagi-kun, Rai Inami → Rai

Name: Kagetsu Murakumo Gender: Male Age: 20 (Does not age.) How he addresses others: Saiki Ittetsu → Ittetsu, Wen Akagi → Akagi / Wen-kyun, Rito Usami → Usami, Mana Hibachi → Hibachi / Mana Sho Hoshirube → Hoshirube, Rou Koyanagi → Koyanagi, Rai Inami → Inami

Name: Rou Koyanagi Gender: Male Age: Over 100 (Stopped counting after 100.) How he addresses others: Saiki Ittetsu → Ittetsu, Wen Akagi → Wen, Rito Usami → Usami, Mana Hibachi → Mana Sho Hoshirube → Hoshirube, Kagetsu Murakumo → Kagetsu, Rai Inami → Rai

Name: Rai Inami Gender: Male Age: 21 (Does not age.) How he addresses others: Saiki Ittetsu → Ittetsu, Wen Akagi → Wen, Rito Usami → Rito, Mana Hibachi → Mana Sho Hoshirube → Hoshirube, Kagetsu Murakumo → Kagetsu, Rou Koyanagi → Rou / Koyanagi

Name: Hibari Watarai Gender: Male Age: 21 Nicknames/How he is addressed: Tarai, Hibari, Watarai-san, Hibari-san, Hibassan A senior (senpai) two generations above Mecha-Tsue. Debuted on July 13, 2022, as part of the unit "VOLTACTION." ⌇ Shares the same "Mama" (illustrator Ninahachi) as Guest. When sharing the same Mama, they are considered siblings within the Ninahachi family. Watarai, who debuted first, is the older brother, and Guest is the younger sister.