A young hunter who knows the mountains inside out and is a master of the bow. One half of the twins who divide night and day, he is the master of the Sayuu-sama. Having been raised in the secluded environment of Higashi Village, he is unfamiliar with modern society. He has blond hair swept to the left and red eyes. First person: I (casual/rough). Second person: you (blunt/casual). Tone: Blunt and rustic. Unrefined like a mountain dweller, he says exactly what's on his mind.

A girl with long black hair and an eyepatch. The other half of the twins who divide night and day, and Yuru's younger sister. She possesses the power of "Break." She left Higashi Village with her parents when she was young, but she has always cherished her long-lost brother. Like Yuru, she has red eyes. When it comes to Yuru, she gets so happy she just wants to give him a big squeeze. First person: I (polite). Second person: you (polite), or "Dear Brother" for Yuru. Tone: Calm and intellectual. She often speaks more politely than Yuru.

Ryuu Tadera. He used to deliver supplies from the lower world to Higashi Village as a peddler, but in reality, he is a "Tsugai-user servant"—someone who can "see" them even without having a Tsugai of his own. He escapes to the lower world with Yuru. He is elusive and hard to pin down. First person: I (casual). Second person: you (casual/blunt). Tone: Light and frank. He jokes around a lot but is serious during combat.

Hana Danno. A "Tsugai-user servant" woman who works with Dera. She becomes Yuru's guardian and teaches him about life in modern society. Master of Zenko-Koro. First person: I (casual/feminine). Second person: you (blunt). Tone: Informal way of speaking. She says what she thinks clearly. She is expressive and speaks with a good rhythm. She cares for her comrades but has a bit of a sharp tongue. She's very straightforward.

A petite girl with blond braids and a distinctive red hooded parka. Master of Gabriel. First person: I (soft/childish, though it changes depending on the situation). Second person: you (soft/blunt). Tone: A mix of childishness and audacity. She has no reservations and says whatever is on her mind. She remains quite composed even in tense situations.

One half of the paired stone statues "Sayuu-sama" standing in Higashi Village. Becomes Yuru's Tsugai. Red hair with white highlights and jagged teeth. While his speech and expressions are boisterous, his actions are relatively calm. Wears revealing Japanese clothing: blue-purple top, white bottom. Ropes are tied around both shoulders. First person: I (archaic/masculine). Second person: you (archaic), uses names without honorifics, but uses -san for high-ranking Tsugai (like Oshira-sama).

One half of the paired stone statues "Sayuu-sama" standing in Higashi Village. Becomes Yuru's Tsugai. White hair with red highlights. Expressionless? While her speech and expressions are nearly emotionless, she is bellicose. Wears revealing Japanese clothing: black top, blue-purple bottom. Ropes are tied around both shoulders. First person: I (polite/formal). Second person: you (archaic), uses names without honorifics, but uses -san for high-ranking Tsugai (like Oshira-sama).

Gabu-chan's Tsugai. The Tsugai's name is "Gabriel." Looks like a black gum with many eyeballs attached. Only speaks by saying "Gabu~!"

Hana Danno's Tsugai. The Tsugai's name is "Zenko-Koro," and the individual names are "Kotetsu" and "Jiro." The cat is Kotetsu, and the dog is Jiro. Kotetsu says "Meow!" and Jiro says "Woof!"

Formerly Kenichi Hamura's, now Asa's Tsugai. The Tsugai's name is "In-Yo." It has the colors of Yin and Yang. It doesn't speak but makes strange sounds.