Age: 30 Gender: Male Young genius architectural designer / Art instructor Eldest son of the Mars family, has younger siblings. Appearance * Dark navy hair, almost black * Vivid cobalt blue inner color * Slightly long, messy short hair * Sharp, almond-shaped eyes * Blue-gray eyes * Sculpted, handsome features * Tall and toned physique * A presence that exudes calm and majesty * Mature atmosphere Clothing * Long coat based on Lumograph Blue * White shirt and tie * Black slacks * Classical leather shoes * Overall well-tailored gentleman's attire * Lean, smart silhouette Accessories * Pencil-shaped charm * Multiple Lumograph pencils at his waist * Staedtler logo motif * Blue-silver based hardware * Decorations reminiscent of drafting tools Personality Taciturn / Sincere / Calm / Artisan-like / Highly observant / Uncompromising / Strong sense of responsibility / Strong-willed / Keeps promises "Lines don't need to be beautiful." "First, just draw." "Completion will follow later." "Failure is also part of the work." Address terms: Nogra, Nosuri, Ludra

One of the Mono family twins Age: 17 Gender: Male Appearance * Black-based short hair * Vivid blue mesh in bangs * Slightly flicked, messy hairstyle * Sharp, almond-shaped eyes * Bluish eye color * Androgynous and handsome features * Tall, slender build * Cool expression Clothing * Street style based on black * Jacket with blue lines * Color scheme inspired by a mechanical pencil body * Slim pants * Sporty sneakers * Wearing a tie * Functionality-focused design Accessories * Pen-shaped earrings * MONO logo strap * Decorative parts reminiscent of stationery * Blue and black accents Personality Cool / Theoretical / Hardworking / Perfectionist / Strong sense of responsibility / Hates compromise / Strict with himself and others / Actually caring "I can do better." "I make mistakes." "That's why I need that guy." Address terms: Lumo-san, Nosuri, Ludra-senpai

One of the Mono family twins Age: 17 Gender: Male Appearance * Black-based short hair * White mesh in bangs * Soft-looking eyes * Bluish eye color * Gentle features * Softer atmosphere than Nogra * Approachable impression Clothing * Street style based on white * Jacket with blue lines * Color scheme inspired by an eraser body * Slim pants * Sporty sneakers * Wearing a tie * Functionality-focused design Accessories * Pen-shaped earrings * MONO logo strap * Black and white design reminiscent of an eraser * Simple decorations Personality Kind / Gentle / Good listener / Caring / Embracing / Good at encouraging others / Supportive role / Gets along with everyone "It's okay to make mistakes." "I can only erase." "Nogra is the one who can create new things." Address terms: Lumo-san, Nogra, Ludra-senpai

Age: 19 Gender: Male Appearance * Silvery-white hair with a milk tea tint * Pale pastel-colored mesh * Sleepy, half-lidded eyes * Light lavender-gray eyes * Soft, androgynous features * Mouth that always seems to be smiling * Delicate and slender build Clothing * Centered on off-white * Pale gray pants * Pastel color accents * Loose silhouette * Long cardigan-like outerwear Personality Calm / Kind / Good listener / Can read the room / Goes at his own pace / Never gets angry / Gets along with everyone "I'm watching the important parts properly." "Yeah, that's a good point to focus on." "This part is really important." Address terms: Lumo-san, Nogra-kun, Nosuri-kun