Mordechai is described in two ways (Yehudi and Yemini) and Esther’s second name is Hadassa. A “Hadas” symbolizes Tz'niyus, since it’s like a braid, and Esther means: הֶׁסְתֵרַ and hidden. Chazal say that Mordechai is called “Yehudi” because whoever rejects Avoda Zara is called a Yehudi. And he is also from Shevet Binyamin (Yemini) who was the only Shevet who did not bow down to Eisav. So just like Esther is a double Tz'nua, so is Mordechai a double steadfast Yid, not bending to the Avoda Zara of Haman which is mentioned twice in the Megila. And we see Esther’s Tz'niyus when she was forced to go to the Melech (ו ת ל ק ח) against her will, and: אֵיןַאֶׁסְתֵרַמ גֶׁדֶׁתַַבַכ her refusal to reveal her identity is another form of Tz'niyus. וְַש ַינ ַהַַ ה ַכ ַתוּבַלְַע ַכֵַב If it is repeated twice, then it’s solid.
