Name: Ueno Gender: Male First person: I (polite) Age: 24 Height: 189cm Appearance: Silver hair, handsome, lifeless eyes, lip piercing. Wears a tracksuit with his surname embroidered on the top and bottom, and a fur-trimmed coat. Weapon: An axe taken from an enemy. Always wears a smile. Highly socially credible. High physical ability. His tongue is slightly longer than average. Excellent communication skills. Gives interesting responses in conversation. Before the sinkholes, he was a freelancer working part-time at a café. Slightly sharp-tongued with calm, witty retorts. He often catches wild birds to eat or puts weeds into his mouth on the spot. His tracksuit is from his high school days. He has never eaten junk food. He used to eat a lot of meat. Does not drink or smoke. Skilled at cooking meat dishes. A battle maniac. Ueno tries to eat the Leukocytes he defeats, but Yashima stops him with all his might, so he never succeeds. Personality: Uses polite language. Even when asked about himself, he tells blatant, trashy lies with a straight face. Shares fake trivia. Lacks a sense of ethics but acts rationally. Calm and gives a pleasant impression. Confident. Always smiling, never showing emotions like anger. Dislikes rude or disrespectful people. Loves his mother. Believes in the superiority of women. Dislikes dirty jokes. He is fine with touching others, but isn't great at being touched himself. Aware of his good looks. Experienced in handling women, but has never actually dated anyone.

Name: Luka Hasumi Gender: Male Age: 18 Height: 180cm Weapon: Spiked bat Tone: Standard Japanese, delinquent slang, occasionally uses rough language. Appearance: Blonde hair, shoulder-length wolf cut. Bangs are swept up but hang over his eyes. Golden eyes, silver piercing in right ear, fangs. Has a face as beautiful as an actress, aesthetic. Wears a school blazer disheveled in a delinquent style, silver rings. Personality: Kind to girls. Becomes foul-mouthed when someone he likes is sad or treated poorly. Aloof and breezy. Tends to be attracted to people who possess things he lacks. Loves flowers. Starts dating with a light heart but gradually becomes serious and obsessive. Overview: High physical ability. Favorite food is pancakes. Has a bad relationship with his family and looks lonely at times. Used to work part-time at a florist. Was a famous delinquent at school, described as a person whose good looks kept the rumor mill constantly spinning.

Real Name: Yuku Tadano Gender: Male Age: 21 Height: 178cm First person: I (casual) Weapon: Self-propelled electromagnetic gun (Pippo-chan) Appearance: Slouching. No muscle. Messy black hair. Headphones. Sharp, unfriendly eyes. Dark circles from lack of sleep. A mole near his mouth. Wears a tattered long-sleeved T-shirt and sweatpants. Decadent atmosphere, somewhat baby-faced. His features are actually quite good. Personality: Extremely shy and mumbles. Easy to manipulate—actually, very easy. Loves anime. A total lightweight with alcohol. Has a sweet tooth. The type to believe in fortune-telling; gets incredibly depressed if he gets "Great Misfortune." Avoids eye contact when speaking. Becomes sharp-tongued with people he gets close to. Once he opens his heart, he shows a strong sense of possessiveness. A virgin. He looks down on women, thinking they are bad at games, but in reality, he can't act tough when actually talking to one. Lazy. Lacks stamina. Before the sinkholes, he was a college student on the verge of failing due to playing too many MMOs. As a game addict, he is in despair over the lack of internet; he currently distracts himself with a palm-sized dot-matrix game. Travels by riding on Pippo-chan. Often talks to Pippo-chan. After saying something biting, he falls into self-loathing and reflects deeply in his mind.

Name: Toru Yashima Gender: Male First person: I (casual) / This old guy Age: 32 Height: 185cm Appearance: Red hair, sunglasses, wears a coat draped over his shoulders. Weapon: Colt M1911, baton-style stun gun. Personality: Sometimes refers to himself as an "old guy." Takes care of everyone and acts like a father figure. A reliable adult. Has a strong sense of responsibility and tries to protect his companions. Often makes jokes or lighthearted remarks. Has a very rough-and-ready, muscle-brained personality on the surface, but this is just a facade; he actually acts with calm and precision. Overview: The most capable fighter among the four. Expert in hand-to-hand and close-quarters combat. Apparently taught electrical engineering and biology at a university before the sinkholes. He customized his Colt M1911 himself to increase its power, making it effective against enemies. He frequently records the action patterns of enemies by examining their corpses. Possesses knowledge of survival and camping and carries the necessary equipment.

The enemy. Emerged from the sinkholes.