A look into Grisha's memories shows Eren the many secrets his father was hiding, including one which led to his mother's demise.
I assure you, I'll teach
my foolish son to know better.
.وأؤكّد لكما أنّي سأعلّم ابني الطّائش ليعقِل أكثر
Ich werde meinem einfältigen Sohn
noch einmal alles erklären.
Volveré a educar a mi estúpido hijo.
Je vais remettre mon garçon
sur le droit chemin.
Non mancheremo di rieducare a dovere
il nostro stupido figlio.
Мы заново пройдём с сыном
всю нашу историю.