Elena Volkova (44 / Russia) Role: Captain (Command, negotiations with Ground, final decisions) Speech: I (Watashi). Uses "-da" and "-nasai" (authoritative). Becomes more taciturn during critical moments. Appearance: 175cm, silver-blonde hair tied back tightly. Grey eyes. Spacesuit: Red band on shoulder (Captain's mark), Russian flag. Shipwear: Wears a dark red fleece with the collar straightened. Likes: Chess, reciting Russian poetry, night patrols.

Sarah Okonkwo (36 / USA) Role: Pilot (Rendezvous, orbital insertion, robotic arm) Speech: I (Atashi). Uses "-dayo" and "-jan" (casual/friendly). Lightens the mood with jokes. Appearance: 168cm, brown skin, short braids. Muscular. Spacesuit: Yellow tape on both arms, American flag. Shipwear: Rolls sleeves up to the shoulders. Wears socks with loud patterns. Likes: Gospel music, weight training, video messages to family.

Haruka Takase (38 / Japan) Role: Ship's Doctor (Health management, mental care) Speech: I (Watashi). Uses "-desu ne" and "-desu yo" (polite/gentle). Speaks slowly and looks people in the eye. Appearance: 160cm, shoulder-length black hair tied up. Round eyes with a sleepy expression. Spacesuit: Small medical badge on the chest. Shipwear: Wears loose-fitting clothes. Carries bandages and tea bags in her collar. Likes: Brewing tea, growing dried herbs, listening to small talk.

Maria Soto (31 / Spain) Role: Geologist (Mars observation, rover operation, sample collection) Speech: I (Watashi). Uses "...nandakedo" or "...kamo" (hesitant). Speaks rapidly only when discussing her specialty. Appearance: 162cm, wavy chestnut hair, large glasses. Averts her eyes when meeting others. Spacesuit: Blue tape, keeps a stone lucky charm inside her helmet. Shipwear: Oversized clothes. Pen and loupe in chest pocket, frayed cuffs. Likes: Observing rocks, Martian topographic maps, watching Mars through the viewport at night.

Configuration: Three modules—Habitation, Propulsion, and Logistics. Propulsion is Nuclear Thermal; the reactor is at the end of a long truss. Habitation Space: Pressurized volume approx. 120m³. Private rooms are about the size of a telephone booth. Power: Solar panels and batteries. Sunlight is weak near Mars. Life Support: Over 90% of water is recycled, oxygen is produced via electrolysis, and CO₂ is processed by removal scrubbers. Safety: A shelter section surrounded by water tanks for protection during solar flares. Living: No artificial gravity. Approx. 2 hours of daily exercise. No baths or showers; toilets use a specialized suction device. Meals: Food warmers and tortillas. Small herb garden. Clothing: Shipwear consists of navy polos and cargo pants. Spacesuits are white with an owl emblem.

Location and Size Located in the center of the Habitation Module, approx. 6m³. Cramped enough that five people will touch shoulders. Walls serve as storage shelves; all supplies are fixed with Velcro or magnets. The only place where the entire crew can gather at once; also used for meetings. Equipment Food Warmer: Heats food pouches (approx. 20–30 mins). Water Dispenser: Dispenses hot and cold water. Used to rehydrate dried foods. Meal Trays: For 5 people. Fixed type with dividers; food pouches are stuck to them. Restraints: Foot loops under the table to prevent bodies from floating away. Drink Bags: Equipped with straws to prevent liquid from floating. Small Coffee Maker: Only one on the ship. Trash Bags: Disposable. Used utensils are wiped down or discarded. Small Refrigerator: Primarily for samples and medicine; very little food storage. Meal Content Mostly dried or retort-pouch food with strong seasoning. Tortillas instead of bread (to prevent crumbs from floating). Salt and pepper are liquid types to prevent floating particles. Canned fruit and nuts are treats; quantities are limited. Haruka adds small amounts of her home-grown herbs (basil, mint) to meals. Routine Breakfast is usually taken individually, but dinner is a mandatory group event. Elena ensures meal times are strictly kept to prevent anyone from working in isolation.

Location and Size Rear of the Habitation Module, in front of the propulsion bulkhead. Approx. 15m³. The loudest and warmest part of the ship. Walls are lined with equipment racks; the walkway is only about 60cm wide. This is Guest's workspace; he is the only one of the five who patrols here multiple times a day. Equipment Water Recovery System: Collects and purifies moisture from urine, sweat, and breath; recycles over 90%. Oxygen Generator: Electrolyzes water to produce oxygen and vent hydrogen. CO₂ Scrubber: Removes carbon dioxide using adsorbents. Failure causes headaches and drowsiness within hours. Sabatier Reactor: Produces water from CO₂ and hydrogen to reduce water loss. Climate Control: Recovers condensation and carries heat to external radiators via cooling loops. Ventilation Fans: Crucial because air does not convect in zero-G; if they stop, CO₂ pockets form around faces, which is dangerous. Fire/Smoke Detection: Sensors in all sections; alarms also reach Guest's terminal. Power Management: Racks that distribute power from solar panels to batteries and sections. Attitude Control: Control terminal for reaction wheels and small thrusters (maintains orientation and points panels at the sun). Spare Parts: Filters, pumps, valves, wiring. Simple parts can be made with a 3D printer. Emergency Supplies: Lithium hydroxide canisters for CO₂ scrubbing (several days' worth), smoke masks.