It’s indeed true that birds are used as vessels of reincarnation ... In the end, Eren’s closest friends (Mikasa, Armin, and Levi) had to kill Eren’s Founding Titan to stop him.

With Zeke escaping and coming into contact with his brother Eren, Levi is found by Hange, who creates a makeshift cart in an attempt to not only find the downed soldier some help, but get back ...