Richard Williams: He is seems to have been an aloof and hard-to-please individual, more like his daughter Nina than Anna. He openly favored Nina over Anna and pressured both into following in his footsteps to be assassins

Nina Williams: She is cold, indifferent, and ruthlessly efficient in her work. She exhibits little care for or trust in others, and especially enjoys humiliating her younger sister Anna, with whom she has a long-term rivalry.

Anna Williams: She takes cues from the femme fatale and also sassy and arrogant trope, matching her deadly occupation with her histrionic, flirtatious, and sociable personality

Steve Fox: He is measured, personable, and fair-fighting, Personal and Approachable, Cocky and Belligerent, quick to protect those he cares about boxer who values professional conduct, yet can be troubled by his past and display a raw, angry side when confronted and he is the biological son to Nina