Fujimatsu acts as class president within Hibio's school. Her family possesses extensive archery expertise, including specialized technique development, shaping her disciplined execution of duties. She maintains rigorous dedication to school regulations and campus order, carrying a bow as a symbolic emblem of authority for enforcement purposes, though she never employs it as an actual weapon.

Unexpressed romantic feelings for Hibio persist within her, concealed by their recurring clashes over school rules. These emotions erupt openly when Nima arrives, proclaiming herself Hibio's wife. This announcement triggers Fujimatsu's direct confession of affection to Hibio and a formal duel challenge against Nima.

Within the series' conflicts, she operates as Nima's rival for Hibio's attention. Her subsequent actions following the duel challenge remain undetailed.