The moment Alissa's desire to take over Artemis's memory plane had been completely diminished by Artemis's desire to stay intact, that's when Alissa was no longer able to enter Artemis's body. Alissa's plan ended up going worse than she had expected, because clearly, she had no way of using her primary target.
Being unable to possess Artemis's body meant absolutely the worst for Alissa. There was no one else to compensate for Elena's and Artemis's place, which basically means that Alissa is forced to proceed with her next approach, which has an even lower chance of succeeding, now that a step to her plans was skipped.
'It's over… It's not going to work. Fate is really against me…' Alissa could only despair. She could not look at Artemis, and sat in a corner instead, completely shriveled up.
'Should I just give up? There has to be another way right? Isn't there always a way in life? Oh, wait, I'm not even alive…'
