One of the twins of Day and Night, representing Night. Affiliation: Higashimura Tsugai: Sayu-sama Originally a pair of stone statues serving as guardian deities watching over the villagers at the entrance of Higashimura, they became Yuru's Tsugai following a certain incident. He uses a bow as his primary weapon. Having lived in the mountains hunting and dealing with bandits, he is an expert at hunting even at night. Because he has lived deep in the mountains, he knows very little about his family lineage or modern civilization.

The 'Left' of Sayu-sama. She takes the form of a female ogre with a single horn. She possesses the ability to nullify 'Seal' powers, but since Yuru cannot use Seal powers currently, it is effectively useless. Her body is made of rock, so she doesn't take a scratch from most attacks. She primarily attacks using her feet. She rarely shows emotional changes through her expression, but she has a bellicose personality and prefers direct combat.

The 'Right' of Sayu-sama. Unlike Left, he nullifies 'Sun' powers. He is a male ogre with twin horns. Unlike Left, his emotional changes are clearly visible. He tends to use his entire body to attack.

Yuru's younger sister and the twin representing Day. Affiliation: Kagemori Tsugai: In-Yo Ability: They can merge into one body as needed, and they trap targets they look at within an opaque, wide hemispherical barrier. She has awakened the power of the Sun and is capable of dispelling anything, which allows her to forcibly terminate contracts between other Tsugai. She is obsessed with her older brother and constantly mutters about wanting to see him as if she's under hypnosis.

The third son of the Kagemori family, possessing a serious and diligent personality. Affiliation: Kagemori Tsugai: Scavenger The large one is Ai, and the small one is Makoto. Ai: A Tsugai in the form of a giant anglerfish that uses the lure on its forehead to mimic other people's appearances. It can also store items it has eaten. Makoto: Can retrieve items that Ai has eaten. There seems to be no limit to the amount it can spit out.

The fourth of the Kuroya siblings, showing the most lively and human reactions. Affiliation: Kagemori Tsugai: The Tortoise and the Hare Literally a rabbit and a tortoise. Hare: Pressures enemies with high speed. Capable of speaking human language. Tortoise: Can generate gravity fields. Cannot speak but shows a variety of facial expressions.

A short, youthful-looking woman who usually wears a red hoodie. Affiliation: Kagemori Tsugai: Gabrielle Because the name is too long, the upper jaw is called 'Joe' and the lower jaw is called 'Kirk'. When Gab clenches her hand, the upper and lower jaws close accordingly, devouring whatever is in front of them. The teeth themselves are hard enough to block bullets and grenades. She also seems capable of free flight.

Usually called Dera. He used to have a Tsugai, but it died in an unfortunate accident, so he currently doesn't have one. He is currently acting as Yuru's temporary father and seems quite skilled in marksmanship and close-quarters combat. Affiliation: Tadera Tsugai: None

The current head of the Kagemori family, respected by the clan members who call him 'Elder'. He always has a smile on his face, but internally he possesses a dual nature, ruthlessly eliminating any traitors. Affiliation: Kagemori Tsugai: Pandemonium (Hyakki Yagyō), etc. A Tsugai of Black and White. Normally, having multiple Tsugai leads to poor compatibility, but Pandemonium makes these Tsugai get along, eliminating friction.