>>9836589Back in the Joshi Origin: Zero saga, Emi used a zygote scraped from Manami Toyota's womb to create the perfect joshi lifeform in the ChocoPro birthing labs deep beneath Ichigaya complex, but the zygote was manipulated upon by an unseen force and it split into twin embryos who were each born in separate test tubes. One became Riho, and the other became Mizuki. They were trained in secret until the age of 8 when they were first exposed to each other.
