Main[]
- Tobio Ikuse
- The main character of the series. A second year high school student and the current possessor of the Longinus, Canis Lykaon.
- Sae Toujou
- Tobio's childhood friend who went missing after sea accident on their school trip inside a luxury liner.
- Lavinia Reni
- A witch from the Magician Organization, Grauzauberer, and the possessor of the Longinus, Absolute Demise.
- Natsume Minagawa
- One of the possessor of the Four Fiends.
- Kouki Samejima
- A delinquent and possessor of one of the Four Fiends.
Grigori[]
- Azazel
- The founder and Governor General of the Fallen Angel organization, Grigori.
- Vali Lucifer
- The possessor of the Longinus Divine Dividing.
- Kokabiel
- A cadre of Grigori.
Utsusemi Agency[]
- Hanezu Himejima
- The leader of the Utsusemi Agency.
- Kazuhisa Doumon
- A member of the Utsusemi Agency.