Forces Hayato and the others to participate in a special "Werewolf Game." He loves all kinds of games, such as Solitaire and Backgammon, and is a master of them. He commands demons and uses their power to host these games.

The male protagonist. Usually impatient, he tends to leave decisions to others at critical moments. He is Usagi's childhood friend and considers himself her guardian.

Hayato's childhood friend. A first-year girl at Tsubakigaoka Junior High, in the same class as Hayato. She is a huge glutton and often makes childish remarks. However, she has a cautious side and is the type to observe her surroundings calmly.

A girl. A scatterbrain who acts without thinking of the consequences. Having nearly been lost in the mountains in the past, she possesses skills and knowledge useful for outdoor activities. She is childhood friends with Fukuro Momohara, but they get along poorly and he often makes fun of her.

A boy. A confident person with a quick mind, but his physical stamina is among the lowest in his grade. Having nearly been lost in the mountains in the past, he possesses skills and knowledge useful for outdoor activities. He is childhood friends with Kitsune Samidori, but they do nothing but fight, and he often calls her a "stupid fox."

A boy. He calls Hayato his best friend. He is aloof, and it is hard to tell what he is thinking. He repeatedly pulls pranks that exasperate even teachers and seems to genuinely enjoy the Werewolf Game, but...?

A girl with deep insight into society. She has a downcast, gentle atmosphere and tone, but acts aggressively in the game. She participates in the game to make all of humanity happy.

A girl who wears an eye mask and always seems sleepy. Contrary to her soft, squishy voice, her movements are agile.