When I ran a Witch Girls games for an all-female group, each of their characters symbolized one of the classic four elements.
Praxithea was fire, an athletic Greek witch with pagan divine parentage (Prometheus)
Elizabeth was water, from witch aristocracy
Gwynhwyvar was air, a half Sidhe from the fae realms
Nathifa was earth, new to her powers, a 21st century digital witch