Ermes is a woman of average to above-average height and fit or medium build. She wears her hair in locks, and she has long, triangular scars approaching her eyes and lips on her forehead and chin. Ermes also surgically altered her breasts in order to be able to hide money from their sides. Despite a tough exterior, Ermes is proud, loyal, and headstrong. She does not shy away from a fight and is willing to do just about anything to put herself in a better situation whether it is taking a bet that could risk her organs to even splitting her own body parts with her Stand ability despite knowing that they eventually have to be fused back, wounding her severely.