Hange, the Survey Corps' brightest member, puts her life at risk to save her friends. Unfortunately, she cannot resist the heat from “the Rumbling,” which burns her body to a crisp and ultimately kills her. ... Hange died while they were trying to kill a wall titan that was very close to the plane.

Why did Hange kill herself?

Both Erwin and Hange died in hopes of answers being found. Erwin with the basement, Hange with the rumbling. Hange even said to Levi that, “it's my turn.” Which in a way points back to all the sacrifices that came before theirs, including Erwin. And the sacrifice DID lead to answers, DID help humanity move forward.

Did Hange really die?

Sadly, Hange is killed in her final stand against the Rumbling, and fans got misty-eyed seeing her reunite with those who died before her afterward. Hange and Erwin had a good laugh about Levi in their shared afterlife, and fans know it will be a bittersweet moment when Levi is finally reunited with his two friends.