Sweet to Mordechai, Bitter to Haman

The Midrash teaches that Hadassah, the myrtle, is Esther: sweet-smelling but bitter in taste, so she was sweet to Mordechai and bitter to Haman. The Chida explains, as recorded by the talmidim of the Arizal, that Esther was a gilgul of Chava, the Serpent was clothed in Haman, and Mordechai was a gilgul of Yaakov. Esther, as Chava, was therefore bitter to the Serpent who had led her to sin. The Bnei Yissaschar adds that the sense of smell is the only one not mentioned in the sin of Adam, so it was never damaged and gives pleasure to the soul, which is why her scent was sweet to Mordechai. Taste, by which the Serpent seduced Chava, was bitter for Haman.