Frill

フリル

Frill is an artificial human created by Acca and Ura-Acca.
Acca and Ura-Acca designed her to possess traits a father would want to see in a daughter. They crafted her to be cheerful and clever, displaying intelligence far surpassing that of the average fourteen-year-old. They also endowed her with a sense of humor.
Acca and Ura-Acca also built flaws into her design, granting her the capacity to express negative emotions and selfishness. Frill appears playful around Acca and Ura-Acca, regarding the three of them as a family.