She is the mother of Wattsburg gym leader Tessla Del, and was often away from home while her husband and three children worked. Sharing the views of the rest of Primavera's citizens, Eve rejects modern social values and extolled the virtues of the simple hard-working life to her children. However, not practicing what she preached, Eve barely spent time with her children, instead running the Primavera gym. Tessla resented her mother for this, and went on, of course, to become the Wattsburg gym leader and supervisor of its power plant. Eve and Tessla's new familial rivalry, and the reason for it, are no secret to the residents of both towns.
As a Gym Leader and an NPC character, she can be used freely; however, it is important to closely follow her character profile, unless of course it's something that's meant to be silly and out of character.