Eagle functions as an autonomous Anima-class interface unit, created to pilot a specialized fighter aircraft designated as a "Daughter." Her assigned vessel is an F-15J Eagle, reverse-engineered by Mitsubishi Heavy Industries using technology from hostile Xi entities. She operates under the call sign "Barbie 02."

Appearing as a teenage girl with blonde hip-length hair and blue eyes, Eagle exhibits a perky, capricious, and occasionally immature personality. She displays pronounced competitiveness and confidence in her combat skills, frequently mocking other Anima units—particularly Phantom for operating an older F-4 Phantom II.

Eagle harbors a familial attachment to Haruka Yashirodōri, the Anima project’s lead scientist, viewing him as a father figure. She also develops an immediate, persistent personal interest in Kei Narutani, engaging with him through flirtatious or attention-seeking behavior.

During Xi incursions, Eagle defends Komatsu Air Base with a direct-confrontation tactical style, contrasting reconnaissance or electronic warfare specialists. In one engagement while Gripen was grounded, she expressed frustration over failing to hit highly maneuverable Xi aircraft.

A pivotal development occurs when Phantom’s RF-4EJ defeats Eagle in a mock duel. She reacts with visible anger and disbelief, rejecting the loss to an aircraft she deems obsolete. Phantom attributes the outcome to Eagle’s immaturity. The defeat intensifies her competitive drive, prompting vows of future victory alongside tantrum-like behavior, highlighting her initial struggle with setbacks.

Integrated into the Japan Air Self-Defense Force’s Independent Mixed Test Unit, Eagle encounters interpersonal conflicts due to dismissive attitudes toward Phantom and Gripen. Her overconfidence and emotional reactions during unit interactions underscore ongoing developmental challenges within the squadron’s dynamics.