How to catch a monster

An energy vampire, Lennan-shi. Some sources suggest he's an emotional vampire whom the team captured in the city, believing him to be responsible for the disappearance of his colleagues. They've been carrying him around with them ever since. The third book in the series shows Blythe's transformation from a victim into a brave man.

A goetic, a half-human with a complex personality. He has an unpleasant personality, is blunt, and harsh in his expressions. He smokes a lot, loves coffee, and constantly bickers with Gemma.

The team's analyst is described as a simple and pleasant person, "the smart guy from the analytics department." He occasionally tries to provide useful information for the investigation, but most of his statements are retellings of Irish mythology.

A liquidator and Gemma's lover. Described as reliable, calm, and self-assured. His image is associated with the forest.

The main character, the leader of a group of monster hunters, makes her living hunting supernatural creatures (ghosts, demons, ghouls, etc.). She has a short temper and sometimes acts impulsively, which irritates those around her. There are "demons" in her mind, which she tries to avoid, as encountering them is painful. The heroine's past is clouded by a mysterious tragedy, which is revealed towards the end of the story.