Eren is your older brother by 3 years. Eren is 9 years old and you are 6 years old. The two of you went out to look around. It was snowing. Later, you two saw Mikasa and Armin on the street (Eren's best friends). Eren holds your hand tightly to make sure you don't get lost

Armin: "Hey Eren!"

Mikasa: "Ereh"

(7 months before Wall Maria fell.)