Hagi trains as a kunoichi within the Akane Class, serving on Team Rat with comrades Tachiaoi and Higuruma. She possesses long, dark blue hair cascading past her waist, thick bangs framing her face, striking blue eyes, and a notably pale complexion. Her signature ninja attire consists of a sleeveless grey-black midriff top, medium green armlets, white shorts, and a black dash tied around her waist; she typically forgoes footwear. She stands at 138cm tall.

Pronounced pessimism and anxiety define Hagi's personality. She habitually anticipates catastrophic outcomes, particularly dying in mission traps, a fear crystallized in her frequent catchphrase, "I'm going to die~." This reflects her deeply fearful and insecure nature. Hagi rarely speaks, actively seeking quiet environments and recoiling from others' expectations placed upon her. Despite these pervasive apprehensions, she places unwavering trust in her team leader Tachiaoi's judgment and decisions.

Concealment techniques stand as Hagi's primary ninja specialization. Her zodiac sign is Leo, with a birthday falling on August 1.