Alastair Hart: Our MC, the story starts from where he was studying in a public military institute before being sent to train for the DEA.

Kate Rosewell: The oldest and the leader in Alastair's previous group, has a troublesome relationship with her brother.

Yu Rosewell: The troublemaker of the group but also the most supportive.

Hoshino Mika: The chief in the group, has many times snuck out of the school in the late of night to one of the local's house, which is owned by an old blind lady, he helps her make meals while also bringing some back for his friends.

Azrael: Also known as "The Second", the legendary man who is believed to be capable of stopping any danger. The current representative as well the one with the highest authority in the DEA and has direct links with the crown prince.

Igor Nikolayevich Romanov: He joins Alastair's party and will be a significant character till the end, fighting along side Alastair.