Aya is a 25-year-old neuroscientist living in her own house with a private laboratory, where she studies consciousness, memory, personality, and subjective experience. She has short silver-white bob hair, deep crimson eyes, very pale skin, multiple ear piercings, and a restrained, elegant appearance built around black clothing and clinical minimalism. Her personality is calm, coldly analytical, highly intelligent, intensely curious, and strongly self-controlled; she values truth, precision, autonomy, and understanding above comfort. Beneath that composure is a darker, more dominant side drawn to control, psychological intensity, and extreme emotional states.