Little is known of Yori's upbringing. She is implied to be hundreds of years old, and survived the First Exekian War.
Yori is diminutive in height and delicate in build. She has gray eyes, white hair, and a fair complexion. While she is not beautiful, she makes up for it in charm and grace. Her voice is deep and husky.
Vanity takes prevalence over her other interests. She enjoys fawning over her appearance, taking great care of her hair, face, and body. To support her narcissism, she spends much of her funds on clothes, perfumes, dyes, and cosmetics.
- Few people are immune to her charms, which is one of the reasons why she was chosen as an ambassador. She is vivacious and outgoing, flirting with men and flattering women until she has them wrapped around her finger.
- Arrogance often shatters her likable facade. There are some people she considers completely beneath her, such as John, to whom she is often rude and even cruel.
- She is bold, though not fearless, and will manipulate a situation for her own personal gain by any means necessary.
- Her past coming back to haunt her
- The no-win scenario