Interesting, so we have multiple theories from different perspectives. The episode didn’t give us much but she sat down woth her dad who told her the time and day that they would be leaving, additionally he told her the name of the yacht.
Emiko had very specific details. Maybe, just maybe, she was the main one responsible for EVERYTHING here. While she may not had been (presumably) already in charge of the circle, she most likely had the league arrange the supplies for one survivor - Oliver. She knew that her dad would kill himself to save him, so then it was a plan that took the minds of Malcom, Emiko and Dante to conspire but Emiko was the mastermind. It was Emiko’s first BIG kill and that’s how she earned leadership of the circle. She was even giving Dante orders in the present and scared him by thteatening him, she obs has power.
The truth that she was responsible will come out in an episode soon and Oliver is gonna be hella shocked. Just watch!