Mikasa appears for the first time i

Mikasa appears for the first time in year 845 somewhere inside Wall Maria. She is seen waking Eren up, telling him that they need to return to home. She is then surprised to see tears in his eyes. On their way home, they meet Hannes. Mikasa watches as Eren complains about the soldiers slacking off while on duty. Later, both Eren and Mikasa watch the return of the Scouting Legion forces, witnessing yet another failure of their expedition. After returning home, Mikasa tells on Eren, telling his parents about his desire to join the Scouting Legion. Annoyed, Eren leaves, with Mikasa following him. They save Armin, who is being beaten by local bullies and together discuss their desire to go outside the walls.At that moment, the three kids witness the arrival of the Colossal Titan and it breaching the wall's gate. Mikasa and Eren run back to their home to find it crushed and their mother trapped under the debris. In spite of their attempts, Mikasa and Eren are unable to free her and with the help of Hannes, they get away as they watch their mother getting eaten alive by a Titan. Mikasa and Eren then get on a ship just as the Armored Titan breaks through the inner gate, letting the Titans inside the Wall Maria. This is when Mikasa witnesses Eren's vow to kill all the Titans.