Locusta

Locusta, a character in the A Courtesan of Rome series, is a protege of your mother. She is first seen in A Courtesan of Rome, Chapter 3.

Appearance
Locusta wears Gallic woad paint that marks her as a wise woman and priestess of Tsirona.

Main Character
On Lena's behalf, you go to the apothecary to purchase charms to hang on the scholae's doors to ward off soldiers and meet Locusta. She immediately knows you are of the Catauni. She tells you that if you need anything from her, if it's in her power, she will grant it. She offers to be a "mother" to you if you will think of her that way, and to teach you about the plants, herbs, and potions she concocts.

Delphinia
Locusta is a protege of Delphinia's. Although the former was reluctant at first, she saw the latter's wisdom and connection to the gods.