Hange Zoë served as the 14th Commander of the Survey Corps, appointed by Erwin Smith before his death. Initially a squad leader overseeing Titan research, Hange exhibited an energetic, inquisitive personality, though early experiences fueled intense hatred toward Titans. A kick revealing a Titan's abnormal lightness shifted this hatred into profound scientific fascination. Conducting experiments on captured Titans, Hange named them and displayed empathy, crying during painful procedures or their deaths. Yet a ruthless streak surfaced during interrogations, threatening Pastor Nick off Wall Sina and smiling while torturing Djel Sannes; pushing glasses onto the forehead often signaled this change. Physically, Hange possessed brown eyes, disheveled dark brown hair usually in a high ponytail, and stood 170 cm tall. Square, strapped glasses were worn on missions, with oval ones used otherwise. An explosion during the Battle of Shiganshina injured their left eye, leading to the adoption of a black eyepatch. Hange wore the standard Survey Corps uniform, green cloak, and bolo tie; off-duty attire consisted of a white shirt, black pants, and coat. Key contributions began with discovering Ilse Langnar's notebook during an expedition, detailing a Titan speaking intelligibly and addressing humans as "Ymir's people." This drove Hange to spearhead Titan capture operations, achieving the first success with Erwin's approval. Research on Titans Sawney and Beane yielded foundational insights, though their deaths triggered a meltdown. Experiments on Eren Yeager revealed critical Titan-shifting mechanics: transformation required clear objectives, and physical objects like a teaspoon could be recovered from his Titan hand. Hange also engineered weapons like the Thunder Spear and designed restraints used to capture the Female Titan. Promoted to Commander after Erwin's death, Hange rebuilt the Survey Corps, modernized Paradis's military using Marleyan defector technology, and navigated geopolitical threats. Pursuing peace with the outside world, Hange opposed Eren Yeager's Rumbling as genocide. When Eren initiated it, Hange united former enemies—Scouts and Marleyan Warriors—into an alliance to stop him. This culminated in Hange sacrificing themself to buy time for the alliance's escape, confronting advancing Colossal Titans alone, resulting in death witnessed by Levi Ackerman. Personal history remained undisclosed, including age, birthplace, and background. The creator maintained Hange's gender ambiguity in the manga, though the anime used feminine pronouns. Notable relationships included mutual respect with Erwin Smith, a pragmatic partnership with Levi Ackerman, and mentorship of Armin Arlert, who succeeded as Commander.