Aiden (often stylized as ∆iden) is characterized by a strikingly stoic, cold-blooded, and enigmatic demeanor, operating as a silent, emotionless, and ruthless hunter who tracks down targets simply for the thrill of the chase. Visually, she is defined by her long, waist-length black hair topped with a distinct, fluffy ushanka hat bearing a unique delta symbol crossed by two parallel lines, which frames a perpetually unreadable, menacing facial expression marked by a large scar over her right eye. She pairs this look with an loosely buttoned navy-blue or grey military army coat, a white undershirt, a striped scarf, a black buckled belt, and fingerless gloves. Mechanically and lore-wise, she possesses peak physical conditioning, immense stealth capabilities, and high weapon proficiency—frequently utilizing tools like a hatchet or specialized bear traps to torment and prolong games with her victims. Despite her terrifying and violent nature as a silent killer, she possesses surprising soft spots, notably maintaining a close, non-hostile friendship with the notorious bully Oliver and caring for her own pet Shiba Inu.