Arisa Sono operates as a key henchwoman for Akiko Natsume at Mishima Heavy Industries, assigned to capture or eliminate the escaped android prototype Atsuko "Nuku Nuku" Higuchi. Her operational partnership with Kyouko Ariyoshi establishes a recurring antagonistic duo, though their dynamic shifts notably from earlier franchise iterations.

In this continuity, Arisa exhibits a more relaxed and less combative personality, contrasting with Kyouko’s serious and driven approach. This temperament difference results in Arisa’s less confrontational demeanor during missions targeting Nuku Nuku.

Deployed alongside Kyouko to retrieve Nuku Nuku, Arisa engages in multiple field operations that consistently fail due to Nuku Nuku’s capabilities and the duo’s operational shortcomings. One mission involving a fighter plane escalates to reckless methods that label them "gone rogue," emphasizing their ineffective teamwork and coordination.

Their missions include a botched attempt to capture an escaped experimental cat, where aggressive tactics inadvertently endanger the animal. Nuku Nuku’s intervention prevents harm, highlighting Arisa and Kyouko’s operational failures and reinforcing a pattern where their actions necessitate external interference rather than achieving objectives.

Specific background details about Arisa’s history or motivations remain undefined in this adaptation. Her role consistently involves executing Mishima’s directives under Akiko’s command, functioning within the pursuit narrative without significant individual development or resolution arcs in the documented materials.