וְהַקָּרֹ֣ב אֵלָ֗יו כַּרְשְׁנָ֤א שֵׁתָר֙ אַדְמָ֣תָא תַרְשִׁ֔ישׁ מֶ֥רֶס מַרְסְנָ֖א מְמוּכָ֑ן שִׁבְעַ֞ת שָׂרֵ֣י ׀ פָּרַ֣ס וּמָדַ֗י רֹאֵי֙ פְּנֵ֣י הַמֶּ֔לֶךְ הַיֹּשְׁבִ֥ים רִאשֹׁנָ֖ה בַּמַּלְכֽוּת׃
and the next unto him was Carshena, Shethar, Admatha, Tarshish, Meres, Marsena, and Memucan, the seven princes of Persia and Media, who saw the king’s face, and sat the first in the kingdom:
Read kabbalistic (mystical) interpretation of Esther 1:14: and classical mystical sources.