Hacka Doll #1 functions as the primary navigator and personal entertainment artificial intelligence for the Hacka Doll application. She debuted in a Japanese mobile news app released by DeNA on August 15, 2014, designed to deliver personalized content by analyzing user preferences in categories such as anime, manga, and gaming.

Her design features blonde hair styled in pigtails, consistent across both the app interface and animated adaptations. She operates alongside two other AI units (#2 and #3) to assist users, though her effectiveness is challenged by a restless and impulsive nature. She tackles tasks with cheerfulness and diligence but often acts without forethought, resulting in unintended complications during user assistance.

Within the anime narrative, her core role involves responding to human requests for entertainment or problem-solving. These assignments frequently require physical manifestation, where her personality traits fuel comedic situations. Examples include attempting idol performances, participating in anime production, assisting tourists, and navigating events like Comiket. Her experiences occasionally explore competence development, though her core traits remain consistent.

Beyond the app and anime, she appeared in crossover media. During an August 2017 limited-time event for *Super Robot Wars X-Ω*, she piloted the original mecha unit Hakadolion, utilizing armaments like the "Heart Beam" and "Twintail Boomerang." From March 2018 to August 2019, she was reimagined as a Virtual YouTuber on the Hacka Channel, maintaining her energetic and optimistic personality. This venture concluded with the franchise's shutdown, marked by a final video on August 26, 2019.

No significant alterations occur to her core background, design, or personality across official media, including the original app, anime adaptations, game collaborations, or VTuber activities.