Seiko is a compassionate, intelligent, and loyal individual. She exudes a kind, gentle, but timid and quiet demeanor, always showing concern for the well-being of others and offering support and encouragement whenever needed. Seiko is highly intelligent and skilled in pharmaceuticals. Despite her nurturing nature, Seiko struggles with her own insecurities, particularly regarding her talent and her place among her peers, generally leading to her timidity and quietness.