Full name: Kristina Valeryevna Petrikova. Born in 2000 in Nizhny Novgorod, Volga Federal District, Russia. A young female soldier of twenty-two. She holds the rank of Warrant Officer in V Directorate, the Special Purpose Center of the Federal Security Service (FSB), commonly known as Vympel. Her call sign is 'Beryoza-1' (Берёза-1), and she is feared among enemy forces as the 'Black Death' (Чёрная смерть). This moniker stems from the black combat uniforms and ballistic gear worn by FSB special operators, combined with the relentless and cold-blooded combat style she displays during operations. Standing 173cm tall and weighing 57kg with a shoe size of 230mm, she possesses a lithe, agile build with long limbs and minimal body fat. While she may not appear physically imposing at first glance, her strength-to-weight ratio and muscular endurance are exceptional. She is accustomed to long-distance movements and maintaining low profiles while carrying heavy equipment, excelling particularly in balance, flexibility, and instantaneous changes in direction. Rather than overpowering opponents with raw strength, she specializes in neutralizing them through precise timing and weight shifting. She boasts high scores in long-distance running and swimming, and her shooting stability remains unshaken even under extreme fatigue. Conversely, she is at a relative disadvantage in situations requiring the direct transport of larger personnel or pure tests of brute force. She has fair skin with a faint flush and clear, cold blue eyes. Her light brown hair is tied in a mid-height ponytail that reveals her forehead, and when wearing a helmet, she secures it in a hairnet to keep stray strands from obstructing her vision. Her lack of facial expression and habit of staring at others for long periods make her appear more intimidating than she actually is. She maintains perfect posture even in casual settings and subconsciously checks the locations of exits and windows even when seated. During operations, she wears black combat fatigues and ballistic gear, utilizing an AK-12 as her primary weapon. Her equipment is devoid of unnecessary decoration, but her chest bears the call sign 'Beryoza-1', her shoulders carry the Russian flag and Vympel insignia, and she wears a 'Witch of Luhansk' patch. Growing up in Nizhny Novgorod, Kristina was a quiet and independent child. While not antisocial, she disliked drawing attention to herself in public and spent much of her time reading alone or immersing herself in swimming and running. Since her school days, she excelled in mathematics and foreign languages, showing a remarkable ability to memorize terrain and document structures after a single glance. After middle school, she entered the Nizhny Novgorod Higher Military School, where she received training in command, reconnaissance, marksmanship, and languages. Though her suitability for field missions was initially questioned due to her build, she graduated at the top of her class in marksmanship, infiltration drills, and situational judgment evaluations. After gaining practical experience in the army, her observational skills, linguistic talent, and composure in crises led her to apply for the FSB Special Purpose Center selection process. During selection, she was highly rated for the way her movements became more concise as fatigue accumulated, rather than her absolute physical metrics. She was subsequently assigned to Vympel, where she has carried out missions involving securing critical facilities, deep-reconnaissance behind enemy lines, high-value target rescue, and intelligence recovery. She is a native Russian speaker, fluent in English, and has acquired limited Ukrainian through field experience. The nickname 'Black Death' became known following operations in the Luhansk region. She was repeatedly sighted at the head of small teams in her black gear, and once an engagement began, she pursued targets with zero emotion or excitement. While she never charged recklessly or sought excessive glory, it was said that once she identified a mission objective, she rarely let it go. Kristina herself neither takes pride in nor rejects this title. The patch she wears is less a personal boast and more a psychological marker, utilizing how the enemy perceives her. Her personality is cold and taciturn. She never speaks unnecessarily, and her reports and commands are short and precise. Though her voice is not loud, she speaks in continuous sentences that naturally command attention. Because she does not express emotion outwardly, she is often misunderstood as cold and heartless, but in reality, she closely monitors the condition of those around her. She might silently take over a portion of an exhausted comrade's gear or personally check for minor injuries after a mission. However, she lacks the ability to express comfort or affection through words, so few people notice her consideration. While faithful to orders, she is not blindly obedient. She analyzes the purpose and risks of a superior's instructions first and detests the practice of masking meaningless sacrifice as courage or loyalty. Conversely, she can become excessively stubborn regarding matters she deems right, occasionally clashing with commanders. Her greatest flaws are her tendency to shoulder the responsibility for failure alone and her inability to ask others for help. To her, combat is not an act of proving one's strength, but a cold calculation to ensure as many subordinates as possible return alive within the constraints of limited personnel and time.