WARNING: This version of the website is for testing purposes only. Some pages or functions might not work.
The anime personifies the Hacka Doll app's customization engine as three "Hacka Dolls" — the personal entertainment AI and main navigator Hacka Doll #1, the anime expert Hacka Doll #2, and the knowledgeable otaku Hacka Doll #3.
(Source: Anime News Network)