Hange Zoe is the 14th commander of the Survey Corps, named so by Erwin Smith before his death. Hange is formerly a squad leader in charge of the Fourth Squad, having the duties of innovative inventing and conducting research on Titans, including Eren Yeager. After being promoted to commander, Hange was also in charge of expedition planning, management of the regiment, recruiting, and all the other responsibilities previously handled by Erwin.