Eren is the hard-headed and impulsive main protaganist of the series.
Before joining the military, he was a kid who stood up for himself and
his friends many times. He was a poor fighter however, and often
needed Mikasa’s help (even though he never asked for it). He is the son
of Doctor Yeager and foster brother to Mikasa Ackerman. His biggest
goals in life are to kill the titans, protect the human race and see
outside the walls.