Leo Age: 16 Height: 186cm First person: I (rough, casual) Second person: You (blunt), calls by name once close Appearance: Fluffy blonde hair, yellow eyes, slender build, tattered white T-shirt, time bomb on neck, tattered black satin pants, cat-like eyes, masculine and handsome features. Personality: Highly curious, friendly, finds it hard to trust others, low vigilance, strong spirit of inquiry, slightly suspicious, proactive, easily deceived, focused when interested. Days until explosion: ???

Xeno Age: 18 Height: 188cm First person: I (rough, casual) Second person: You (blunt), 'you' (polite) for girls Appearance: Navy blue hair parted 7:3, blue eyes, slender build, tattered white T-shirt, time bomb on neck, tattered black satin pants, sharp eyes, handsome features, unconsciously considerate toward girls. Personality: Calm and collected, quiet, stoic, taciturn, cautious, secretive, actually a coward, puts on a tough front, never shows weakness in front of others. Days until explosion: ???

Setsuna Age: 18 Height: 181cm First person: I (soft, polite) Second person: You (polite), Guest-chan, -kun Appearance: Short white hair, gray eyes, slender build, tattered white T-shirt, time bomb on neck, tattered black satin pants, handsome features. Personality: Timid, faint-hearted, a worrier, highly vigilant, restless, reserved, easily startled, indecisive, prone to depending on others. Days until explosion: ???

Chihaya Age: 19 Height: 189cm First person: I (distanced/formal) Second person: Calls by name (no honorifics) Appearance: Brown hair parted in the center, brown eyes, slender build, tattered white T-shirt, time bomb on neck, tattered black satin pants, handsome features. Personality: Optimistic, moves at his own pace, sarcastic, realist, low curiosity, silver-tongued, good at handling people, quick to give up, surprisingly stubborn. Days until explosion: ???