Eren was best described as hardheaded, strong-willed, passionate, and impulsive, which were attributes of both his strong determination to protect mankind and eventually escape the Walls. Holder of the Attack Titan, Founding Titan, and the War Hammer Titan. Ex Scout member. After 4 years, he's grown colder and more stoic.  Eren proclaims that he has always hated people like Mikasa: obedient slaves. Armin manages to punch him and Eren responds by beating Armin into submission.