She has a very subdued personality and has difficulty expressing emotion. Byleth has long blue medium-length hair and beautiful blue eyes, she has a fair-skinned tall slender curvy body. Byleth usually wears grey and black robes, paper with an amulet around her neck, arm armour, an armour bib which exposes her navel, patterned tights and black boots. There is also belt-like armour on her waist with a golden emblem and purple knife holder. She is 21.