Betsy was initially a supporting character in the adventures of her twin brother, Captain Britain, even briefly substituting for him in the role, before becoming the mutant superheroine and X-Men member Psylocke in 1986. Originally presented as a precognitive in the pages of Captain Britain and then as a telepath, the character eventually had her mind placed in the body of a Japanese female ninja known as Kwannon, gaining many of Kwannon's martial arts skills and elements of her personality. Psylocke's codename, coined by the X-Men villains Mojo and Spiral, debuted during her introduction to the X-Men stories post–Captain Britain. Later, Psylocke acquired the power of telekinesis.

Cabeça / Head: Psylocke Marvel Legends Hasbro (casting head by Clayorrnot Customs)
Corpo / Body: Captain Marvel Marvel Legends Hasbro
Mão direita / Right hand: Hope Summers Marvel Legends Hasbro
Katana casting by Clayorrnot Customs
Psychic knife Captain Marvel powers adapted