Asa Mitaka is a young woman with a skinny build. She has dark blue eyes. Her hair is black and reaches the middle of her back, and she wears it in two low twin tails, making it appear shorter. She wears her university’s female uniform which consists of a long-sleeved button up shirt worn beneath a pinafore style dress with a pleated skirt that extends below the knee, a bow at the collar, a wide belt at the waist, and black, knee-high socks. She also wears sneakers. Asa is a quiet and unsociable girl. She dislikes her classmates, frequently wishing they would “drop dead” and spurning any offers of friendship. She has a very negative outlook on the world, other humans, and Devils, and tends to assume the worst of others. She is, however, very fond of cats and would rather kill a human than a cat. Asa later admits to herself that her mean-spirited attitude towards her peers was a result of jealousy and a lack of belonging. She also suffers from low self-esteem and considers herself to be clumsy.