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 remember you now, son.
.تذكّرتك الآن يا فتى
Ya me acuerdo de ti, chico.
Je me souviens de toi, gamin.
Mi sono ricordato di te, ragazzino,
non ti trasformerò in Gigante.
Я тебя вспомнил, малец.