Theresia van Astrea is the Sword Saint of the Kingdom of Lugunica.

She's an open-minded, sociable girl who have a fatal flaw of shoving aside her own personal feelings while only focusing on those of others. She never wanted to wield a sword, but because of her lineage and the death of her father and brother during the Demi-Human War, she was chosen by the Sword God.

She is tall and have long red hair with flowers attached to it, tying it in two ponytails, while a big part of her hair stay loose.