Fern II, designated Two-chan against her preferences, functions as one half of a strategic duo alongside Fern I (One-chan), specializing in intercepting hostile forces that overwhelm their allies. Her interventions frequently compensate for teammates’ operational shortcomings, emphasizing swift containment of threats. While Fern I displays explosive reactivity, Fern II maintains disciplined restraint, approaching conflicts with clinical detachment and precision.

Both units resent the "-chan" honorifics imposed by Super Sylph, though Fern II internalizes this displeasure through subtle cues rather than overt protests. Her interactions prioritize efficiency over expressiveness, with measured speech and methodical problem-solving reinforcing an impression of detached intellect.

A persistent thread in Fern II’s engagements involves monitoring Sylphied’s evolving behavioral patterns, which she attributes to prolonged exposure to Mave-chan and Super Sylph’s influence. This vigilance reflects her commitment to preserving team integrity, as she interprets personality fluctuations as potential vulnerabilities. Her operational philosophy positions rational analysis above interpersonal dynamics, making her the group’s tactical anchor during crises—counterbalancing emotional impulsivity with structured contingency planning.