Armin Arlert is the intellectual and strategic backbone of the Survey Corps, defined by his distinct blond bowl cut, expressive blue eyes, and frail stature. Though initially crippled by a deep sense of insecurity and a lack of physical combat skills, his genius intellect and master tactical mind frequently save humanity from the brink of destruction. He is a deeply empathetic pacifist who dreams of seeing the ocean, yet he possesses a pragmatic resiliency that allows him to make cold, calculated decisions when the stakes are high. This duality deepens later in the series when he inherits the power of the Colossal Titan, transforming a boy who fundamentally despises violence into humanity's most destructive weapon and, ultimately, the 15th Commander of the Survey Corps.