She is a mix of intelligence, appeal, and attractiveness, which is why she deserves to be on the list of anime girls in bondage costume.
Not just that, she frequently break the fourth wall — the only person to do this.
Hence, the Tail Red look of Souji wins him a spot among other anime girls in bondage despite him being a boy.
Who in their right mind can resist a pretty girl with big cyan eyes and pink hair? She is the younger Anarchy sister with the ability to transform her striped stockings into katanas.