Arisa functions as a loyal employee of Akiko Natsume, CEO of Mishima Heavy Industries, in multiple adaptations. Within the original OVA series, she serves alongside partner Kyoko Koitabashi as one of Akiko’s primary field agents. Arisa exhibits a markedly aggressive and impulsive operational style, frequently resorting to excessive force like missile strikes without hesitation. This tendency contributes to repeated mission failures against Nuku Nuku and the Natsume family.

Her character endures significant physical comedy through defeats, often suffering extensive injuries at Nuku Nuku's hands. These failures trigger professional repercussions from Akiko, including salary deductions and increased workloads to offset destroyed corporate assets. Financial hardship becomes a recurring theme, with Arisa and Kyoko living in poverty due to penalties.

Repeated defeats foster personal animosity toward Nuku Nuku, occasionally driving Arisa to unsanctioned actions. One such incident involves sabotaging Nuku Nuku's workplace at a Mishima-owned restaurant, motivated by jealousy over Nuku Nuku's success and resentment over their own reduced circumstances. This operation backfires catastrophically, incurring further punishment.

In the *DASH!* alternate continuity, Arisa appears with Kyoko in swapped bodies after an unexplained incident, resulting in a substantially altered personality. This version presents Arisa as more relaxed and less violent compared to her original portrayal, while Kyoko becomes the aggressive counterpart, shifting their operational dynamic.

Across all adaptations, Arisa maintains unwavering devotion to Akiko and Mishima Heavy Industries. She participates in diverse corporate initiatives against Nuku Nuku, including deploying experimental weapons, coordinating kidnapping attempts targeting Ryunosuke Natsume, and managing combat robotics projects. Her role persists as a comedic antagonist whose failures drive much of the series' physical humor.