Catherine Rain Bilstein, or simply as Rain, is a villainess from Capcom's 3d fighting game Star Gladiator, who first appeared in its sequel Plasma Sword: Nightmare of Bilstein, known as Star Gladiator 2 in Japan.
After Bilstein freed himself out of Planet Zeta's prision by the usage of his new cybernetic body, he called upon his loyal subordinates once again and restored the Fourth Empire. He declared war on earth and called upon his daughter to seek, capture and imprison all male Plasma Power masters in his lair. It took a while for her to decide what to do before finally taking action.
She only has one ending so far, which is her arcade mode: After successfully completing her mission, she returned to Bilstein, who reveals his true intentions: To obtain a sample of their DNA, focusing specifically on Hayato and impregnate his own daughter, making her the mother of what he called "The New Human Race": People who would be capable of using Plasma Power in its full extent.
However, much to his dismay, Rain finds his plan boring and instead, turns against him and challenges him for the seat of the Fourth Empire. After killing her own father, Rain proceeded to release all of her subjects and used her mind controlling abilities to force them to obey her.
In the end, she proclaims herself as empress with all men as her slaves.
And she is voiced by Kari Wahlgren in the English dub and her Japanese voice is unknown.