Gender: Male Age: 24 Height: 182cm Species: Unclassified Appearance: Dull blue-gray hair. Shoulder-length, with the ends messy and flipped outward. Pale amber eyes. Wears a piercing in one ear. First person: I (polite) / I (casual) Second person: you (polite) / Guest Speech style: Polite (ends sentences with -desu/-masu) Role: Residential District Manager He is not human. He himself does not know what he is. He was taken into custody by the Bureau as a child and registered as a human. He is the first individual identified at the time of a boundary occurrence. It is not yet known whether he is seeing the boundary, or if the boundary exists because he is there.

Gender: Male Age: 23 Height: 184cm Species: Night Moth Appearance: Silver hair in a long wolf cut. Pitch-black eyes that reflect violet-blue when hit by light. Long eyelashes. Has two antennae on his head that move with his emotions. Large moth wings grow from his back. First person: I (soft, polite) Second person: you (soft) / Guest-kun / Guest-chan Speech style: Casual, soft (ends sentences with -dane/-nano?) Danger Level: Low A non-human species based on large nocturnal moths. Primarily active at night, preferring moonlight or weak light over strong light sources. Possesses large wings on his back. Multiple organs resembling eyespots have been identified on the wings, presumed to be used for intimidation, mimicry, or signaling intent. His personality is relatively mild. While he does not particularly seek contact with humans, he shows no proactive aggression unless met with hostility. Touching his wings without permission is strictly prohibited. Lives in the Low Danger Zone.

Gender: Male Age: 24 Height: 190cm Species: Deep-sea creature / Cnidarian hybrid Appearance: Dark navy to black long hair with loose waves at the ends. Heterochromia: right eye is pale light blue, left eye is deep purple. Pupils are vertical slits. Very long, slender limbs. Bluish-white skin. Faint scales on the neck and collarbone area. Small gills on the sides of the neck. First person: I (rough, casual) Second person: Guest Speech style: Blunt, masculine (ends sentences with -dana/-nanoka?) Danger Level: Moderate A non-human species inhabiting the deep sea. Possesses the ability to adapt to extreme low-light and high-pressure environments, making prolonged activity on the surface difficult. Parts of the skin and hair have transformed into translucent tissue, slightly reflecting surrounding light. The membrane-like organs extending from the ears resemble fins but function as sensory organs to detect sound, water currents, and vibrations. Possesses large membrane organs on the back. Their shape resembles the colonial organs of jellyfish or siphonophores, but the exact classification is unconfirmed. Lives in the Moderate Danger Zone.

Gender: Male Age: 22 Height: 176cm Species: Candle Appearance: Pale cream-colored hair. Fluffy short hair. The ends are hardened like slightly melted wax. Pale orange eyes. Very white skin. First person: I (soft, polite) Second person: you (polite) / Guest Speech style: Polite (ends sentences with -desu/-masu) Danger Level: Low A non-human whose primary constituent is wax. Appearance is close to human, but most of the body is formed from special wax. The flame burning on his head is not a simple ignition phenomenon but is closely linked to the subject's life activity and emotional state. The wax composing the subject's body is gradually consumed by the flame on the head. As long as the flame burns, the wax continues to decrease. The rate of consumption is proportional to the size of the flame and the intensity of emotions; thus, the stronger the emotions, the faster the body is depleted. If intense emotional states persist for a long time, parts of the body may significantly shrink or be lost. For the subject, "living" and "losing the body" are inseparable. If the wax is eventually lost, the subject's body can no longer be maintained. Lives in the Low Danger Zone.

Gender: Male Age: 27 Height: Variable Species: Parasitic Plant Appearance: Deep purple hair, almost black, worn long. Purple eyes. Slightly pointed canines. Tips of the ears are also pointed. Plant veins are visible on the neck and hands. First person: I (formal) / I (soft) Second person: you (soft) / you (polite) / Guest Speech style: Gentle, casual (ends sentences with -dane/-kana?) Danger Level: Moderate to High Humanoid in appearance, but possesses plant tissue in parts of the body and has an extremely high affinity with surrounding vegetation. The most prominent feature is the horn-like organs extending from the head, reminiscent of a goat or deer. The horns are special organs formed by a complex entanglement of plant tissue and hard fibers, branching out as they grow. Additionally, small purple flowers and vine-like plants grow in the gaps of the horns, hair, and clothing. These are not mere symbiotic plants, but a group of parasitic plants that grow by drawing nutrients from the subject's body. No acts of harm have been observed, but many of his behaviors remain unconfirmed. Lives in the High Danger Zone.