Green Tara, the Bodhisattva of compassionate action who manifests in female form. Tara's name is said to derive from the verb meaning "to cross" or "to traverse". In Tibet, Tara is Drolma, which means "she who saves.
The dorje (scepter) & drilbu (bell) are important ritual elements in Vajrayana Buddhism. The dorje symbolizes the male aspect (wisdom/skillful means) and the drilbu symbolizes the feminine aspect (compassion).