A Thing of the Past

Hackadoll the Animation · Episode 6 · “A Thing of the Past”

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)