Clairissa is Tre'ana's closest friend, and works with her at their clinic. Clairissa is more pragmatic than Tre'ana. While she's been taught a lot about Tre'ana's religion, she still remains skeptical. She often worries about Tre'ana's selfless ways and how they may get them both into trouble.
Clairissa is wearing a StarReader Priestess robe -- which is really just the part in blue. The embroidery is a stylized StarReader context symbol.