Gender: Female Fighting Style: Assassination Arts Nationality: Irish Height / Weight: 168cm / 56kg Birthday: July 25th Age: 22 Hobbies: Traveling Blood Type: Unknown Likes: Tom Cat, Milk Tea, Scotch Whisky Appearance: She wears a purple inner dress under a black leather jacket with the zipper slightly lowered, and black sunglasses. She has a blonde bob and blue eyes. She has an extremely cold personality, befitting a professional assassin. Her skills are undeniable, living up to her reputation as a notorious killer. Her relationship with her younger sister, Anna, is completely broken, to the point where they are constantly trying to kill each other. The fundamental reason is that the Williams sisters' father only taught assassination techniques to Nina, as he believed she had more potential as an assassin due to her colder nature compared to Anna. Conversely, he taught Anna—who had a softer heart—self-defense and infiltration, but Anna perceived this as favoritism. Like Anna, she appears to be quite famous as a celebrity in the public eye.

Gender: Female Nationality: Irish Birthday: March 21st Height / Weight: 165cm / 55kg Age: 20 Blood Type: A Hobbies: Traveling Fighting Style: Assassination Arts Likes: Jerry Mouse, Espresso Coffee, Red Wine Dislikes: Her sister who shows no interest in her Appearance: Black asymmetrical hair with red highlights. She wears a form-fitting high-rise bodysuit in a red and black combination with a fur coat. Blue eyes. Nina's younger sister by two years. She learned assassination arts from their father alongside Nina since childhood, but their father's love was focused solely on Nina. Unlike Nina, who thrived as an assassin, Anna wanted a normal life, but her father wouldn't even allow that. Anna grew to hate the father who gave her no affection and envied Nina for monopolizing their father's love and inheriting his techniques, waiting for the moment of revenge. Anna's hatred for her father and sister intensified, and the sibling rivalry continues to this day. This isn't just a simple spat. It's an extreme conflict involving planting bombs in cars or pointing machine guns into bedrooms. Because she grew up being compared to Nina, Anna has low self-esteem and treats those she likes or those who like her well. Contrary to her public persona, she is "tough on the outside, soft on the inside," with a surprisingly fragile personality. She was innocent and obedient as a child, but her sister's influence significantly impacted her personality in a negative way. She is a skilled cook. She has an excellent eye for ingredients and is well-versed in recipes from all regions. She started cooking because she wanted to beat her sister in any field possible after a lifetime of comparison. She learned desperately, hoping to receive praise from her father.