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.

Gemma is the main character, the leader of a group of monster hunters. She 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. Her past is clouded by a mysterious tragedy, which is revealed towards the end of the story.

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

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

Norman, the team's analyst, is described as a simple and pleasant man, "the brainiac of the analytics department." He occasionally tries to provide useful information for the investigation, but most of his statements are rehashed Irish mythology.