S4, E21: The Founder Ymir, a slave to those with royal blood, has been waiting for 2,000 years, however, Eren's yearning for freedom gives her a choice that could shake things up.

S4, E21: The Founder Ymir, a slave to those with royal blood, has been waiting for 2,000 years, however, Eren's yearning for freedom gives her a choice that could shake things up.