Pharsalia operates as a disruptive force within the timeline, bypassing constraints faced by the primary Arthurs group. Her actions actively alter historical outcomes, exemplified by eliminating General Bartos after the protagonists refuse intervention in Florien's conquest, viewing it as fixed. This intervention starkly opposes the group's commitment to preserving history, emphasizing her chaotic neutral independence.

Her motivations shift significantly: initially driven by carefree whims, she later reveals a focused objective tied to maintaining balance or order. She confronts leader Dancho, ridiculing her inability to achieve Fairy Combine—a potent synchronization with her fairy partner. Pharsalia warns this pursuit breeds unhappiness and declares a preemptive intent to destroy the group, citing their escalating threat. She issues a one-week ultimatum: return to their time or face annihilation. This pivot toward destructive goals, aimed at preventing timeline disruptions, marks a pivotal evolution.

Her dynamic with Youhei, also called Mercenary Arthur, complicates her agenda. They jointly monitor the group's growing power, especially after witnessing a successful Fairy Combine. While Pharsalia reacts with heightened resolve to annihilate them, Youhei tempers her immediate aggression, prompting the deadline instead of an instant attack. This interaction implies his potential influence, though she remains the dominant force in their shared purpose.