“You may say that Esther has a bad reputation, that she was defiled with Ahasuerus, [yet] she was worthy that the Holy Spirit would be clothed in her as written, Esther put on her מַלְכוּת [Malkhut] royal apparel [Esther 5:1]. Yet the blessed Holy One said, I am YHWH: that is My Name: and My glory will I not give to another, neither my praise to graven images [Isaiah 42:8]. [However] the Holy Spirit is the Shekhinah and is a name that was clothed with Esther.
The sages of the Mishnah say: It is said of the Matronita: and His kingdom rules over all [Psalms 103:19]. After Esther put on [royal apparel/Malkhut] she ruled over Ahasuerus and his people, and it is said of them, [But the other Jews that were in the king’s provinces gathered themselves together, and defended their lives, and had rest from their enemies,] and killed of their foes (seventy and five thousand, but they laid not their hands on the spoil) [Esther 9:16]. If you say that [Ahasuerus] mated with her, perish the thought, though they were in the same house. Rather it was like Joseph of whom it says, and she [the wife of potiphar] laid out בִּגְדוֹ [bigdo] his garment, by her [Genesis 39:16]. בִּגְדוֹ [bigdo] his garment—this is like treacherous dealers have dealt very בָּגָדוּ [bagadu] treacherously [Isaiah 24:16]. There is a great mystery here, which is why אֶסְתֵּר [Ester] Esther, is derived from סֵתֶר [seter] secret, as written, You are סֵתֶר [seter] a hiding place, for me [Psalms 32:7], since the Shekhinah hid her from Ahasuerus and gave him a female demon instead while she returned to Mordechai’s arm. And Mordechai, who knew the explicit Name and the seventy tongues, did all this with wisdom [cf. BT Sanhedrin 17a]” (Ra’aya Meheimna Ki Tetze, cf. Zohar 2:277a).