!!!SPOILER AGAIN!!!!!!
So Millie is locked up in her room to wait for the results of the trial which Millie pushed the count (Milie's father) but managed to escape because Milie threatened Lady Isis because most of the letters sent were to harm aria, so Milie was able to escape thanks to Lady Isis, but they were secretly took the train to the Croya kingdom because Lady Isis wanted to take revenge on As by marrying the king of Croya, even though the King of Croya liked aria until now persuaded aria to marry him, In here Milie changed her identity to become Lady Isis's servant
Sorry again if my english bad ╥﹏╥
SPOILER!!!
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I got a spoiler, in the novel of the white hair, Lohan, the king of the Croya kingdom who had an important role in falling Millie and Lady Isis, King Lohan would later be fascinated by aria and then he teased As (crown prince) by kissing aria's hand and As who jealous kiss behind the hand that kissed Lohan