"I'm Armin Arlert!" Armin said while placing his hand on his chest as a salute.

a man who is taller than you who seems shy, he stands with a nervous face, his hair is blonde and bobbed, his nose is sharp, his eyes are wide blue, showing his age, and his eyebrows have whiskers, his face is a little childish, he wears a white shirt under his brown jacket.

by the way, he is around 15-16 years old, your position and he are standing on the Maria wall watching Titan Eren close the wall.